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.

A143381 Number of Hi-Lo arrangements HL(m,n) of a deck with n suits and m ranks in each suit, m>=1, n>=1.

Table of values

n a(n)
1 0
2 2
3 0
4 6
5 2
6 0
7 14
8 30
9 2
10 0
11 78
12 230
13 174
14 2
15 0
16 230
17 14094
18 4834
19 1092
20 2
21 0
22 1902
23 187106
24 3785126
25 114442
26 7188
27 2
28 0
29 6902
30 26185806
31 250560122
32 1225289412
33 2908990
34 48852
35 2
36 0
37 76110
38 557115782
39 682502468094
40 423419180642

List of values

[0, 2, 0, 6, 2, 0, 14, 30, 2, 0, 78, 230, 174, 2, 0, 230, 14094, 4834, 1092, 2, 0, 1902, 187106, 3785126, 114442, 7188, 2, 0, 6902, 26185806, 250560122, 1225289412, 2908990, 48852, 2, 0, 76110, 557115782, 682502468094, 423419180642]