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.

A300946 Rectangular array A(n, k) = (-1)^k*hypergeom([-k, k + n/2 - 1/2], [1], 4) with row n >= 0 and k >= 0, read by ascending antidiagonals.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 3
5 19
6 1
7 5
8 33
9 239
10 1
11 7
12 51
13 387
14 3011
15 1
16 9
17 73
18 587
19 4737
20 38435
21 1
22 11
23 99
24 847
25 7123
26 59523
27 496365
28 1
29 13
30 129
31 1175
32 10321
33 89055
34 761121
35 6470385
36 1
37 15
38 163
39 1579
40 14499
41 129367
42 1135005
43 9854211
44 84975315

List of values

[1, 1, 1, 1, 3, 19, 1, 5, 33, 239, 1, 7, 51, 387, 3011, 1, 9, 73, 587, 4737, 38435, 1, 11, 99, 847, 7123, 59523, 496365, 1, 13, 129, 1175, 10321, 89055, 761121, 6470385, 1, 15, 163, 1579, 14499, 129367, 1135005, 9854211, 84975315]