A011762 -id:A011762 - cp's OEIS frontend

A167507 Number of letters in the French spelling of the number n, not counting hyphens and spaces.

4, 2, 4, 5, 6, 4, 3, 4, 4, 4, 3, 4, 5, 6, 8, 6, 5, 7, 7, 7, 5, 9, 9, 10, 11, 9, 8, 9, 9, 9, 6, 10, 10, 11, 12, 10, 9, 9, 10, 10, 8, 12, 12, 13, 14, 12, 11, 12, 12, 12, 9, 13, 13, 14, 15, 13, 12, 13, 13, 13, 8, 12, 12, 13, 14, 12, 11, 12, 12, 12, 11, 12, 13, 14, 16, 14, 13, 15, 15, 15, 12, 13

Offset: 0

M. F. Hasler, Nov 18 2009

Sequence A007005 is a variant of this sequence, where spaces and hyphens are counted.

In most languages, there exists a number N after which all numbers are written with fewer letters than the number itself. In English, in German and in French, N = 4. Here, if n > 4, then a(n) < n, and if n <= 4, then a(n) > n. - Bernard Schott, Jan 11 2019

			The terms a(0),...,a(16) represent the number of characters in the strings "zéro", "un", "deux", "trois", "quatre", "cinq", "six", "sept", "huit", "neuf", "dix", "onze", "douze", "treize", "quatorze", "quinze", "seize".
Since spaces and punctuation are not counted, a(n) is less than the length of the character string whenever the spelling of n contains hyphens, as in "dix-sept" (a(17)=7), or spaces as in "vingt et un" (a(21)=9).

Wiktionnaire, Annexe:Nombres de 1 à 100 en français (as of Nov. 18, 2009).
Index entries for sequences related to names of numbers

Cf. A005589 (English analog), A167508 (counts distinct letters).

Cf. A001050 (Finnish analog), A006994 (Russian analog), A007208 (German analog), A011762 (Spanish analog), A026858 (Italian analog).

apply( {A167507(n)=#[0|c<-Vecsmall(French(n)), c>96]}, [0..81]) \\ updated by M. F. Hasler, Feb 19 2020 [If old versions of PARI/gp give an error, use e.g. Vec(Vecsmall...).]
/* Helper function: spell out n in French. Extended to 10^24 (now further extensible via the 2nd optional argument) for A204593 on Feb 16 2012. */
French(n, t=[10^18,"trillion", /*10^15,"billiard",*/ 10^12,"billion", 10^9,"milliard", 10^6,"million"])={ if( n>999, n>=10^6*t[1] & error(n" is too large - this implementation is restricted to n < 10^",5+#Str(t[1])); forstep(i=1,#t,2, n\t[i] & return(Str(French(n\t[i])" "t[i+1], if(n\t[i]>1,"s",""), if(n%t[i],Str(" "French(n%t[i])),"")))); return(Str(if(n\1000>1,Str(French(n\1000)," "),""),"mille",if(n%1000,Str(" ", French(n%1000)),""))));
n<20 & return([ "zero","un","deux","trois","quatre","cinq","six","sept","huit","neuf", "dix","onze", "douze","treize","quatorze","quinze","seize","dix-sept","dix-huit","dix-neuf"][n+1]);
n >= 100 & return( Str( if( n>199, Str(French(n\100)," "), ""), "cent", if(n%100,Str(" ",French(n%100)),if(n>199,"s","")/*deux cents*/)));
n > 80 & return( Str( "quatre-vingt-", French( n-80 )));
n%10==0 & return( Str( ["vingt","trente","quarante","cinquante","soixante", "soixante-dix","quatre-vingts"][n\10-1] ));
Str( French((n\10-(n>70))*10), if(n%10==1," et ","-"), French(n%10+10*(n>70)))}
\\ M. F. Hasler, Nov 19 2009

Keyword "fini" removed by M. F. Hasler, Nov 19 2009

a(80) and a(81) corrected by Bernard Schott, Feb 19 2020

A101432 Each term is the number of letters in the Spanish name of the previous term.

Original entry on oeis.org

1, 3, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4, 6, 4

Offset: 0

Kevin Langdon (kevin.langdon(AT)polymath-systems.com), Jan 17 2005; corrected May 24 2005

			Uno tres cuatro seis cuatro seis ...

Index entries for linear recurrences with constant coefficients, signature (0,1).

Cf. A011762 (number of letters).

Cf. A000655 (English), A061504 (French), A328263 (Polish).

a(n) = 5-(-1)^n for n>1, with a(0)=1 and a(1)=3. - Wesley Ivan Hurt, Oct 03 2020

More terms from Kara A. Houck (kah979(AT)psu.edu), Apr 20 2006

A131603 Number of letters in n (in Filipino or Tagalog, excluding spaces and hyphens).

Original entry on oeis.org

4, 3, 6, 5, 4, 4, 4, 4, 4, 5, 5, 9, 10, 10, 10, 9, 10, 9, 10, 10, 9, 13, 16, 15, 14, 14, 14, 14, 14, 15, 8, 12, 15, 14, 13, 13, 13, 13, 13, 14, 8, 12, 15, 14, 13, 13, 13, 13, 13, 14, 7, 11, 14, 13, 12, 12, 12, 12, 12, 13, 8, 12, 15, 14, 13, 13, 13, 13, 13, 14, 7, 11, 14, 13, 12, 12, 12, 12, 12, 13, 7, 11, 14, 13, 12, 12, 12, 12, 12, 13, 9, 13, 16, 15, 14, 14, 14, 14, 14, 15, 9

Offset: 0

Ray G. Opao, Jun 08 2011

			a(2)=6, since 2 is dalawa in Filipino.
a(8)=4, since 8 is walo in Filipino.

Wikipedia, Tagalog
Index entries for sequences related to number of letters in n

Cf. A005589, A011762.

A153453 a(n) = letters(n) + a(n-1); a(0) = 0 in Spanish.

Original entry on oeis.org

0, 3, 6, 10, 16, 21, 25, 30, 34, 39, 43, 47, 51, 56, 63, 69, 78, 88, 97, 107, 113, 122, 131, 141, 153, 164, 174, 185, 195, 206, 213, 224, 235, 247, 261, 274, 286, 299, 311, 324, 332, 344, 356, 369, 384, 398, 411, 425, 438, 452, 461, 474, 487, 501, 517, 532, 546, 561, 575, 590, 597

Offset: 0

Rodolfo Kurchan, Dec 26 2008

Álvar Ibeas, Table of n, a(n) for n = 0..10000

Cf. A067278, A011762.

More terms from Álvar Ibeas, Sep 20 2020

A305403 Number of Ukrainian letters in Ukrainian name of n.

Original entry on oeis.org

4, 4, 3, 3, 6, 4, 5, 3, 5, 6, 6, 10, 10, 10, 12, 10, 11, 10, 12, 12, 8, 12, 11, 11, 14, 12, 13, 11, 13, 14, 8, 12, 11, 11, 14, 12, 13, 11, 13, 14, 5, 9, 8, 8, 11, 9, 10, 8, 10, 11, 8, 12, 11, 11, 14, 12, 13, 11, 13, 14, 9, 13, 12, 12, 15, 13, 14, 12, 14, 15, 8, 12, 11, 11, 14, 12, 13, 11, 13, 14, 10, 14, 13

Offset: 0

Felix Fröhlich, May 31 2018

Apostrophes, when the name is written with Ukrainian letters, are not counted as letters. If they were, then, for example, a(5) would be 5, but here, a(5) = 4, because the apostrophe is ignored.

			Using the BGN/PCGN romanization system, the names of numbers are nul', odyn, dva, try, chotyry, .... Note that the number of letters in the romanized name of n does not necessarily coincide with the number of letters when the name of n is written in Ukrainian script.

E-Hern Lee, Table of n, a(n) for n = 0..10000
MyLanguages, Ukrainian numbers
Of Languages and Numbers, Counting in Ukranian
Wikipedia, List of numbers in various languages - Slavic languages
Wikipedia, Romanization of Ukrainian
Wikipedia, Ukrainian alphabet
Index entries for sequences related to names of numbers

Cf. A005589 (English), A007005 (French), A026858 (Italian), A006994 (Russian), A011762 (Spanish).

(* only works up to 999999 *)
upto20 = {0, 4, 3, 3, 6, 4, 5, 3, 5, 6, 6, 10, 10, 10, 12, 10, 11, 10, 12, 12, 8}
tens = {0, 6, 8, 8, 5, 8, 9, 8, 10, 9}
hundreds = {0, 3, 6, 6, 9, 6, 7, 6, 8, 8}
thousands = {0, 10, 9, 9, 12}
f[x_] := If[x == 0, 4, If[x > 999 && x < 5000, thousands[[Quotient[x, 1000] + 1]] + f[Mod[x, 1000]],
  If[
    x < 1000,
    If[Mod[x, 100] <= 20, upto20[[Mod[x, 100] + 1]], upto20[[Mod[x, 10] + 1]] + tens[[Mod[Quotient[x, 10], 10] + 1]]] + hundreds[[Mod[Quotient[x, 100], 10] + 1]] + thousands[[Mod[Quotient[x, 1000], 10] + 1]],
    5 + f[Quotient[x, 1000]] + If[Mod[x, 1000] == 0, 0, f[Mod[x, 1000]]]
  ]
]]
For[i = 0, i <= 10000, i++,
  j = 0;
  Print[i, " ", f[i]]
] (* E-Hern Lee, Jul 11 2018 *)

More terms from E-Hern Lee, Jul 11 2018

A109339 Number of letters in 2n (in Spanish).

Original entry on oeis.org

4, 3, 6, 4, 4, 4, 4, 7, 9, 9, 6, 9, 12, 10, 10, 7, 11, 14, 12, 12, 8, 12, 15, 13, 13, 9, 13, 16, 14, 14, 7, 11, 14, 12, 12, 7, 11, 14, 12, 12, 7, 11, 14, 12, 12, 7, 11, 14, 12, 12, 4, 9, 12, 10, 10, 10, 10, 13, 15, 15, 12, 15, 18, 16, 16, 13, 17, 20, 18, 18, 14, 18, 21, 19, 19, 15

Offset: 0

Cynthia Disenfeld (cynrd(AT)yahoo.com), Aug 20 2005

Spaces are ignored.

			0: a(cero) = 4
2: a(dos) = 3
4: a(cuatro) = 6
6: a(seis) = 4

Bisection of A011762.

Extended by Ray Chandler, Jul 16 2009

A162355 Nonnegative integers whose Spanish and English names contain the same number of letters.

Original entry on oeis.org

0, 1, 2, 7, 20, 21, 22, 27, 70, 73, 78, 134, 141, 142, 147, 150, 153, 158, 165, 166, 169, 184, 194, 200, 201, 202, 207, 220, 221, 222, 227, 270, 273, 278, 305, 306, 309, 310, 317, 318, 325, 326, 329, 330, 333, 338, 371, 372, 377, 380, 383, 388, 390, 393, 398

Offset: 1

Claudio Meller, Jul 01 2009

Spaces and hyphens are ignored.

			0 = "zero" = "cero"; 1 = "one" = "uno"; 2 = "two" = "dos"; 7 = "seven" = "siete".

Cf. A005589, A011762.

{n: A005589(n) = A011762(n)}

Corrected by N. J. A. Sloane, Jul 01 2009 and Jul 13 2009

Remove 218, add 318 - Ray Chandler, Jul 15 2009

A173216 a(n) is the result of multiplying n by the number of letters of the name in Spanish.

Original entry on oeis.org

3, 6, 12, 24, 25, 24, 35, 32, 45, 40, 44, 48, 65, 98, 90, 144, 170, 162, 190, 120, 189, 198, 230, 288, 275, 260, 297, 280, 319, 210, 341, 352, 396, 476, 455, 432, 481, 456, 507, 320, 492, 504, 559, 660, 630, 598, 658, 624, 686, 450, 663, 676, 742, 864, 825, 784, 855, 812, 885, 420

Offset: 1

Rodolfo Kurchan, Feb 12 2010

			a(1) is 3 because UNO has 3 letters by 1 = 3.
a(2) is 6 because DOS has 3 letters by 2 = 6.
a(3) is 12 because TRES has 4 letters by 3 = 12.
a(4) is 24 because CUATRO has 6 letters by 4 = 24.
a(5) is 25 because CINCO has 5 letters by 5 = 25.

Published in Snark, Feb 27 2001.

Cf. A011762.

a(n) = n*A011762(n). - Michel Marcus, Nov 14 2023

More terms from Michel Marcus, Nov 14 2023

cp's OEIS Frontend

A167507 Number of letters in the French spelling of the number n, not counting hyphens and spaces.

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A101432 Each term is the number of letters in the Spanish name of the previous term.

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A131603 Number of letters in n (in Filipino or Tagalog, excluding spaces and hyphens).

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A153453 a(n) = letters(n) + a(n-1); a(0) = 0 in Spanish.

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A305403 Number of Ukrainian letters in Ukrainian name of n.

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A109339 Number of letters in 2n (in Spanish).

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A162355 Nonnegative integers whose Spanish and English names contain the same number of letters.

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A173216 a(n) is the result of multiplying n by the number of letters of the name in Spanish.

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