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.

A360348 a(n) = [y^n*x^n/n] log( Sum_{m>=0} (1 + m*y + y^2)^m * x^m ) for n >= 1.

Table of values

n a(n)
1 1
2 9
3 100
4 1381
5 22771
6 435138
7 9442049
8 229265109
9 6160375990
10 181559237499
11 5826147967201
12 202295647539886
13 7559401377952659
14 302570522540568557
15 12917629672442043340
16 586047019821392518293
17 28159186576616423049683
18 1428679795354280280080736
19 76329278834398327082152543

List of values

[1, 9, 100, 1381, 22771, 435138, 9442049, 229265109, 6160375990, 181559237499, 5826147967201, 202295647539886, 7559401377952659, 302570522540568557, 12917629672442043340, 586047019821392518293, 28159186576616423049683, 1428679795354280280080736, 76329278834398327082152543]