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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.

A156914 Square array T(n, k) = q-binomial(2*n, n, k+1), read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 3
5 6
6 1
7 4
8 35
9 20
10 1
11 5
12 130
13 1395
14 70
15 1
16 6
17 357
18 33880
19 200787
20 252
21 1
22 7
23 806
24 376805
25 75913222
26 109221651
27 924
28 1
29 8
30 1591
31 2558556
32 6221613541
33 1506472167928
34 230674393235
35 3432
36 1
37 9
38 2850
39 12485095
40 200525284806
41 1634141006295525
42 267598665689058580
43 1919209135381395
44 12870

List of values

[1, 1, 2, 1, 3, 6, 1, 4, 35, 20, 1, 5, 130, 1395, 70, 1, 6, 357, 33880, 200787, 252, 1, 7, 806, 376805, 75913222, 109221651, 924, 1, 8, 1591, 2558556, 6221613541, 1506472167928, 230674393235, 3432, 1, 9, 2850, 12485095, 200525284806, 1634141006295525, 267598665689058580, 1919209135381395, 12870]

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