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.

A291848 G.f.: Sum_{n>=0} x^n * Product_{k=0..n-1} (1 + (2*k+1)*x + x^2).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 15
5 47
6 150
7 522
8 1903
9 7319
10 29396
11 122988
12 534141
13 2400061
14 11136516
15 53220492
16 261576725
17 1319629445
18 6825232486
19 36137198722
20 195664517227
21 1082169511883
22 6108213101658
23 35153836421302
24 206126910439763
25 1230477025952427
26 7473067121404104
27 46146114390128888
28 289554642297817561
29 1845220293901278041
30 11936266843924805064

List of values

[1, 1, 2, 6, 15, 47, 150, 522, 1903, 7319, 29396, 122988, 534141, 2400061, 11136516, 53220492, 261576725, 1319629445, 6825232486, 36137198722, 195664517227, 1082169511883, 6108213101658, 35153836421302, 206126910439763, 1230477025952427, 7473067121404104, 46146114390128888, 289554642297817561, 1845220293901278041, 11936266843924805064]