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.
%I A141498 #8 Feb 22 2025 19:05:29 %S A141498 2,6,2,30,2,42,2,30,2,66,46,2730,2,6,2,510,2,798,2,1650,2,138,94,2730, %T A141498 2,6,2,870,2,14322,2,510,46,6,142,140100870,2,6,2,67650,2,12642,862, %U A141498 690,2,282,2,4501770,2,66,2,1590,2,798,46,870,2,354,2,283933650,2,6,2,510,2 %N A141498 a(n) = A010696(n-1) * A086892(n). %p A141498 A010696 := proc(n) op( (n mod 2)+1,[2,6]) ; end: A086892 := proc(n) gcd(2^n-1,3^n-1) ; end: %p A141498 A141498 := proc(n) A010696(n-1)* A086892(n) ; end: seq(A141498(n),n=1..80) ; # _R. J. Mathar_, Sep 03 2009 %Y A141498 Cf. A010696, A086892. %K A141498 nonn %O A141498 1,1 %A A141498 _Paul Curtz_, Aug 10 2008 %E A141498 Offset modified, extended by _R. J. Mathar_, Sep 03 2009