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.

A059135 A hierarchical sequence (S(W2{3}c) - see A059126).

Original entry on oeis.org

11, 54, 161, 396, 887, 1890, 3917, 7992, 16163, 32526, 65273, 130788, 261839, 523962, 1048229, 2096784, 4193915, 8388198, 16776785, 33553980, 67108391, 134217234, 268434941, 536870376, 1073741267, 2147483070, 4294966697, 8589933972, 17179868543, 34359737706
Offset: 0

Views

Author

Jonas Wallgren, Jan 19 2001

Keywords

Crossrefs

Formula

Conjectures from Colin Barker, Oct 07 2015: (Start)
a(n) = -53 + 2^(6+n) - 21*n.
a(n) = 4*a(n-1) - 5*a(n-2) + 2*a(n-3) for n > 2.
G.f.: -(10*x+11) / ((x-1)^2*(2*x-1)).
(End)
a(n) = a(n-1) + Sum_{k=0..7*2^n-1} A059127(7*2^n-7+k) with a(-1)=0. - Sean A. Irvine, Sep 12 2022

Extensions

More terms from Sean A. Irvine, Sep 12 2022