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.

A086646 Triangle, read by rows, of numbers T(n,k), 0 <= k <= n, given by T(n,k) = A000364(n-k)*binomial(2*n, 2*k).

Table of values

n a(n)
0 1
1 1
2 1
3 5
4 6
5 1
6 61
7 75
8 15
9 1
10 1385
11 1708
12 350
13 28
14 1
15 50521
16 62325
17 12810
18 1050
19 45
20 1
21 2702765
22 3334386
23 685575
24 56364
25 2475
26 66
27 1
28 199360981
29 245951615
30 50571521
31 4159155
32 183183
33 5005
34 91
35 1
36 19391512145
37 23923317720
38 4919032300
39 404572168
40 17824950
41 488488
42 9100
43 120
44 1

List of values

[1, 1, 1, 5, 6, 1, 61, 75, 15, 1, 1385, 1708, 350, 28, 1, 50521, 62325, 12810, 1050, 45, 1, 2702765, 3334386, 685575, 56364, 2475, 66, 1, 199360981, 245951615, 50571521, 4159155, 183183, 5005, 91, 1, 19391512145, 23923317720, 4919032300, 404572168, 17824950, 488488, 9100, 120, 1]