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.

A306485 Expansion of Product_{k>=1} 1/(1 - Catalan(k)*x^k), where Catalan = A000108.

Table of values

n a(n)
0 1
1 1
2 3
3 8
4 26
5 78
6 271
7 874
8 3096
9 10537
10 37884
11 132282
12 484369
13 1723568
14 6362479
15 23042165
16 85706354
17 313629597
18 1175860079
19 4340963778
20 16355209663
21 60882536222
22 230370880224
23 862533878347
24 3278709952956
25 12337333292318
26 47042968508785
27 177882993705004
28 680221802560835
29 2581438941995517

List of values

[1, 1, 3, 8, 26, 78, 271, 874, 3096, 10537, 37884, 132282, 484369, 1723568, 6362479, 23042165, 85706354, 313629597, 1175860079, 4340963778, 16355209663, 60882536222, 230370880224, 862533878347, 3278709952956, 12337333292318, 47042968508785, 177882993705004, 680221802560835, 2581438941995517]