cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A284155 Continued fraction expansion of A104691: ePi, digits of e and Pi interleaved.

Original entry on oeis.org

2, 2, 1, 2, 3, 1, 2, 7, 5, 1, 2, 1, 15, 19, 1, 3, 4, 2, 1, 16, 1, 1, 10, 3, 9, 1, 1, 4, 9, 2, 1, 3, 2, 4, 7, 1, 2, 23, 1, 14, 1, 1, 5, 1, 13, 1, 2, 42, 1, 1, 1, 1, 3, 6, 15, 1, 1, 2, 1, 7, 2, 2, 1, 6, 864, 1, 19, 2, 1, 18, 1, 1, 1, 2, 88, 2, 4, 1, 1, 4, 1
Offset: 0

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Author

M. F. Hasler, Mar 21 2017

Keywords

Comments

Continued fraction expansion of A104691, as A058382 is the continued fraction expansion of A001355 ("Pie"). Added mainly for completeness, mathematical interest is questionable.

Crossrefs

Programs

  • PARI
    contfrac(eval(Strchr(vector(#(c=apply(c->Vecsmall(Str(c)),[exp(1),Pi]))[1],i,c[i%2+1][i\2+(i!=3)])))-1)

A104694 Rearrangement of positive integers according to number of odd and even digits in n^3.

Original entry on oeis.org

2, 3, 1, 4, 12, 5, 6, 18, 7, 10, 19, 8, 14, 21, 9, 16, 47, 11, 20, 53, 13, 22, 54, 15, 24, 67, 17, 29, 68, 23, 30, 69, 25, 32, 72, 26, 35, 75, 27, 36, 76, 28, 38, 78, 31, 40, 84, 33, 41, 85, 34, 42, 87, 37, 44, 89, 39, 50, 93, 43
Offset: 1

Views

Author

Zak Seidov, Mar 18 2005

Keywords

Crossrefs

Formula

{A104692(n), A104691(n), A104693(n)}, n=1, 2, ...
Showing 1-2 of 2 results.