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.

A360058 a(n) = Sum_{k=0..n} (-1)^k * binomial(n+2*k+2,n-k) * Catalan(k).

Table of values

n a(n)
0 1
1 2
2 2
3 2
4 3
5 3
6 2
7 4
8 5
9 0
10 4
11 13
12 -7
13 -7
14 48
15 -16
16 -93
17 180
18 74
19 -584
20 517
21 1111
22 -2850
23 207
24 8281
25 -10738
26 -11740
27 46967
28 -22167
29 -115845
30 211052
31 94468
32 -766989
33 660110
34 1554938
35 -3983408
36 121429
37 12272689
38 -15692006
39 -18841086
40 72792247
41 -31828764

List of values

[1, 2, 2, 2, 3, 3, 2, 4, 5, 0, 4, 13, -7, -7, 48, -16, -93, 180, 74, -584, 517, 1111, -2850, 207, 8281, -10738, -11740, 46967, -22167, -115845, 211052, 94468, -766989, 660110, 1554938, -3983408, 121429, 12272689, -15692006, -18841086, 72792247, -31828764]