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.

A320904 T(n, k) = binomial(2*n + 1 - k, k)*hypergeom([1, 1, -k], [1, 2*(n - k + 1)], -1), triangle read by rows, T(n, k) for n >= 0 and 0 <= k <= n.

Table of values

n a(n)
0 1
1 1
2 3
3 1
4 5
5 7
6 1
7 7
8 16
9 15
10 1
11 9
12 29
13 42
14 31
15 1
16 11
17 46
18 93
19 99
20 63
21 1
22 13
23 67
24 176
25 256
26 219
27 127
28 1
29 15
30 92
31 299
32 562
33 638
34 466
35 255
36 1
37 17
38 121
39 470
40 1093
41 1586
42 1486
43 968
44 511
45 1
46 19
47 154
48 697
49 1941
50 3473
51 4096
52 3302
53 1981
54 1023

List of values

[1, 1, 3, 1, 5, 7, 1, 7, 16, 15, 1, 9, 29, 42, 31, 1, 11, 46, 93, 99, 63, 1, 13, 67, 176, 256, 219, 127, 1, 15, 92, 299, 562, 638, 466, 255, 1, 17, 121, 470, 1093, 1586, 1486, 968, 511, 1, 19, 154, 697, 1941, 3473, 4096, 3302, 1981, 1023]