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.

A365025 Square array read by antidiagonals: T(n, k) := (k/2)!/k! * ((2*n+1)*k)! * ((2*n+1/2)*k)! / ( (n*k)!^2 * ((n+1/2)*k)!^2 ) for n, k >= 0.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 10
5 1
6 1
7 126
8 300
9 1
10 1
11 1716
12 79380
13 11440
14 1
15 1
16 24310
17 20612592
18 65523780
19 485100
20 1
21 1
22 352716
23 5318784900
24 328206021000
25 60634147860
26 21841260
27 1
28 1
29 5200300
30 1368494343216
31 1552041334596844
32 5876083665270000
33 59774707082376
34 1022041020
35 1

List of values

[1, 1, 1, 1, 10, 1, 1, 126, 300, 1, 1, 1716, 79380, 11440, 1, 1, 24310, 20612592, 65523780, 485100, 1, 1, 352716, 5318784900, 328206021000, 60634147860, 21841260, 1, 1, 5200300, 1368494343216, 1552041334596844, 5876083665270000, 59774707082376, 1022041020, 1]