A052384 -id:A052384 - cp's OEIS frontend

A107488 Number of letters in the words formed by the digital recitation of Pi in the English language.

5, 3, 4, 3, 4, 4, 3, 3, 4, 5, 4, 5, 4, 5, 4, 5, 3, 5, 5, 4, 3, 3, 3, 4, 5, 5, 5, 5, 3, 5, 4, 4, 4, 3, 5, 5, 4, 3, 4, 5, 3, 3, 4, 5, 4, 4, 5, 5, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 4, 4, 4, 4, 4, 3, 5, 4, 5, 5, 3, 3, 4, 4, 3, 3, 5, 3, 3, 4, 5, 4, 4, 5, 3, 3, 5, 4, 5, 4, 5, 3, 4, 5, 4, 3, 3, 3, 5, 4, 3, 5, 4, 5, 3, 3, 4

Offset: 1

Cino Hilliard, May 28 2005

Essentially the same as A052384. [From R. J. Mathar, Aug 24 2008]

			Three, one, four, one, five, nine has digit count 5, 3, 4, 3, 4, 4 the first 6 entries in the sequence.

RealDigits[Pi,10,120][[1]]/.{0->4,1->3,2->3,3->5,5->4,6->3,7->5,8->5,9->4} (* Harvey P. Dale, Nov 04 2021 *)

readpi(n) = { local(x,a,d); default(realprecision,200); d=vector(10); a=vector(n); d[1]=4;d[2]=3;d[3]=3;d[4]=5;d[5]=4;d[6]=4;d[7]=3;d[8]=5;d[9]=5;d[10]=4; a=Vec(Str(Pi)); print1(5","); for(x=3,n-1, y=floor(eval(a[x])); print1(d[y+1]",") ) }

A242898 Cumulative number of letters in decimal expansion of Pi being spoken in English as "Three Point One Four One...".

Original entry on oeis.org

5, 10, 13, 17, 20, 24, 28, 31, 34, 38, 43, 47, 52, 56, 61, 65, 70, 73, 78, 83, 87, 90, 93, 96, 100, 105, 110, 115, 120, 123, 128, 132, 136, 140, 143, 148, 153, 157, 160, 164, 169, 172, 175, 179, 184, 188, 192, 197, 202, 206, 209, 213, 217, 222, 225, 229, 233

Offset: 1

Jonathan Vos Post, May 25 2014

			a(1) = 5 because "Three" has five letters;
a(2) = 10 because "Three Point" has ten letters;
a(3) = 13 because "Three Point One" has thirteen letters.

Cf. A000796, A005589, A052384, A107488.

A242898 := proc(n)
    5+add(A052384(i),i=1..n-1) ;
end proc:
seq(A242898(n),n=1..57) ; # R. J. Mathar, Jun 30 2020

a(n) = 5 + SUM[i=1..n-1] A005589(A000796(i)).

a(n) = 5 + SUM[i=1..n-1] A107488(i).

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A107488 Number of letters in the words formed by the digital recitation of Pi in the English language.

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A242898 Cumulative number of letters in decimal expansion of Pi being spoken in English as "Three Point One Four One...".

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