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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.

A236934 Triangle of Poupard numbers g_n(k) read by rows, n>=1, 1<=k<=2n-1.

Table of values

n a(n)
1 1
2 0
3 2
4 0
5 0
6 4
7 8
8 4
9 0
10 0
11 32
12 64
13 80
14 64
15 32
16 0
17 0
18 544
19 1088
20 1504
21 1664
22 1504
23 1088
24 544
25 0
26 0
27 15872
28 31744
29 45440
30 54784
31 58112
32 54784
33 45440
34 31744
35 15872
36 0
37 0
38 707584
39 1415168
40 2059264
41 2576384
42 2911744
43 3027968
44 2911744
45 2576384
46 2059264
47 1415168
48 707584
49 0

List of values

[1, 0, 2, 0, 0, 4, 8, 4, 0, 0, 32, 64, 80, 64, 32, 0, 0, 544, 1088, 1504, 1664, 1504, 1088, 544, 0, 0, 15872, 31744, 45440, 54784, 58112, 54784, 45440, 31744, 15872, 0, 0, 707584, 1415168, 2059264, 2576384, 2911744, 3027968, 2911744, 2576384, 2059264, 1415168, 707584, 0]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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