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.

A371637 Triangle read by rows: T(n, k) = (-8)^k*binomial(2*n, 2*k)*Euler(2*k, 1/2).

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 12
5 20
6 1
7 30
8 300
9 488
10 1
11 56
12 1400
13 13664
14 22160
15 1
16 90
17 4200
18 102480
19 997200
20 1616672
21 1
22 132
23 9900
24 450912
25 10969200
26 106700352
27 172976960
28 1
29 182
30 20020
31 1465464
32 66546480
33 1618288672
34 15740903360
35 25518205568

List of values

[1, 1, 2, 1, 12, 20, 1, 30, 300, 488, 1, 56, 1400, 13664, 22160, 1, 90, 4200, 102480, 997200, 1616672, 1, 132, 9900, 450912, 10969200, 106700352, 172976960, 1, 182, 20020, 1465464, 66546480, 1618288672, 15740903360, 25518205568]