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.

A365978 Expansion of e.g.f. 1 / ( 1 - Sum_{k>=0} x^(3*k+2) / (3*k+2) ).

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 6
5 24
6 90
7 1008
8 7560
9 54432
10 712152
11 7620480
12 81130896
13 1266632640
14 17587441872
15 246734377344
16 4527397929600
17 77238618702336
18 1340945212763520
19 28407941067018240
20 574640938744314624
21 11868502219930137600
22 285787326567523173120

List of values

[1, 0, 1, 0, 6, 24, 90, 1008, 7560, 54432, 712152, 7620480, 81130896, 1266632640, 17587441872, 246734377344, 4527397929600, 77238618702336, 1340945212763520, 28407941067018240, 574640938744314624, 11868502219930137600, 285787326567523173120]