A000655 -id:A000655 - cp's OEIS frontend

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

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

A328263 a(n) = number of letters in a(n-1) (in Polish), with a(1) = 1.

Original entry on oeis.org

1, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6, 5, 4, 6

Offset: 1

Robert Bilinski, Oct 09 2019

a(1) = 1; for n>1, a(n) = numbers of letters in Polish name for a(n-1).

Decimal expansion of 515/333. - Elmo R. Oliveira, May 05 2024

			Jeden, pięć, cztery, sześć, pięć, ...

Robert Bilinski, Table of n, a(n) for n = 1..99
Index entries for linear recurrences with constant coefficients, signature (0,0,1).

Cf. A008962 (number of letters).

Cf. A000655 (English), A061504 (French), A101432 (Spanish).

a(n) = a(n-3) for n > 4. - Elmo R. Oliveira, May 05 2024

A061504 a(1) = 1; for n>1, a(n) = numbers of letters in French name for a(n-1).

Original entry on oeis.org

1, 2, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4, 6, 3, 5, 4

Offset: 1

N. J. A. Sloane, Jun 14 2001

a(n+1) = le nombre des lettres dans a(n), a(1) = 1 (in French).
The English (1, 3, 5, 4, 4, 4, ...) and German (1, 4, 4, 4, ...) versions are less interesting.
Decimal expansion of 13847/11110 = 1.24635463546354635... - Eric Angelini, Sep 17 2006; corrected by Elmo R. Oliveira, Jun 29 2024

			Un, deux, quatre, six, trois, cinq, quatre, ...
UN (2 letters), DEUX (4 letters), QUATRE (6 letters), SIX (3 letters), TROIS (5 letters), CINQ (4 letters), QUATRE (6 letters), ...

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

Cf. A007005 (number of letters).

Cf. A000655 (English), A101432 (Spanish), A328263 (Polish).

From Elmo R. Oliveira, Jun 29 2024: (Start)
G.f.: x*(1+2*x+4*x^2+6*x^3+2*x^4+3*x^5)/(1-x^4).
a(n) = a(n-4) for n > 6. (End)

Edited by N. J. A. Sloane at the suggestion of Andrew S. Plewe, Jun 08 2007

A329505 Expansion of (1 + x)(1 + 2x - x^2) / (1 - x).

Original entry on oeis.org

1, 4, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4

Offset: 0

N. J. A. Sloane, Nov 20 2019

Decimal expansion of 1309/9000. - Elmo R. Oliveira, May 07 2024

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

Row 2 of array in A329504.

Essentially the same as A000655.

Vec((1 + x)*(1 + 2*x - x^2) / (1 - x) + O(x^80)) \\ Colin Barker, Nov 21 2019

a(n) = 4 for n >= 3.

A334631 a(n) = number of letters in the sum of all previous terms, with a(1) = 1 (in US English, excluding spaces and hyphens).

Original entry on oeis.org

1, 3, 4, 5, 8, 9, 6, 9, 9, 9, 10, 12, 10, 10, 14, 18, 21, 20, 22, 10, 13, 21, 19, 20, 21, 16, 18, 23, 20, 21, 14, 18, 21, 20, 22, 22, 19, 22, 16, 21, 22, 18, 21, 20, 22, 12, 18, 18, 22, 19, 22, 18, 22, 20, 22, 23, 18, 21, 20, 22, 22

Offset: 1

Robert Bilinski, Sep 14 2020

			a(4) = 5, as a(1) + a(2) + a(3) = 8 and 8 has 5 letters in English.

Cf. A000655, A005589.

cp's OEIS Frontend

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

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A328263 a(n) = number of letters in a(n-1) (in Polish), with a(1) = 1.

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A061504 a(1) = 1; for n>1, a(n) = numbers of letters in French name for a(n-1).

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A329505 Expansion of (1 + x)*(1 + 2*x - x^2) / (1 - x).

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A334631 a(n) = number of letters in the sum of all previous terms, with a(1) = 1 (in US English, excluding spaces and hyphens).

Views

Author

Keywords

Examples

Crossrefs

A329505 Expansion of (1 + x)(1 + 2x - x^2) / (1 - x).