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.

A265613 a(n) = CatalanNumber(n+1)*n*(3*n^2+5*n+2)/((4+n)*(3+n)).

Table of values

n a(n)
0 0
1 1
2 8
3 44
4 210
5 935
6 4004
7 16744
8 68952
9 281010
10 1136960
11 4576264
12 18349630
13 73370115
14 292746300
15 1166182800
16 4639918800
17 18443677230
18 73261092240
19 290845019400
20 1154169552900
21 4578702310182
22 18159992594568
23 72014135814704
24 285542883894800
25 1132125641947300

List of values

[0, 1, 8, 44, 210, 935, 4004, 16744, 68952, 281010, 1136960, 4576264, 18349630, 73370115, 292746300, 1166182800, 4639918800, 18443677230, 73261092240, 290845019400, 1154169552900, 4578702310182, 18159992594568, 72014135814704, 285542883894800, 1132125641947300]