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.

A271309 Integers k such that A264137(k) < A060385(k).

Original entry on oeis.org

52, 60, 65, 74, 75, 76, 85, 108, 111, 121, 124, 125, 127, 131, 132, 140, 144, 150, 153, 156, 158, 172, 175, 180, 183, 185, 195, 201, 209, 213, 216, 220, 225, 250, 263, 287, 300, 301, 327, 328, 335, 337, 339, 344, 356, 370, 402, 404, 408, 412, 417, 423, 433, 435
Offset: 1

Views

Author

Altug Alkan, Apr 03 2016

Keywords

Comments

For all corresponding values of k, A000129(k) is a composite number. In other words, k cannot be a term of A096650.

Examples

			52 is a term because A264137(52) = 66923 < A060385(52) = 90481.
		

Crossrefs

Programs

  • PARI
    a060385(n) = my(f=factor(fibonacci(n))[, 1]); f[#f];
    a000129(n) = ([2, 1; 1, 0]^n)[2, 1];
    a264137(n) = my(p=factor(a000129(n))[, 1]); p[#p];
    lista(nn) = for(n=3, nn, if(a264137(n) < a060385(n), print1(n, ", ")));

Extensions

a(37)-a(54) from Amiram Eldar, May 19 2024