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.

A168452 Self-convolution of A005568, where A005568(n) is the product of two successive Catalan numbers C(n)*C(n+1).

Table of values

n a(n)
0 1
1 4
2 24
3 180
4 1556
5 14840
6 152092
7 1646652
8 18613664
9 217852008
10 2623657384
11 32361812912
12 407342311632
13 5217211974832
14 67836910362772
15 893766246630572
16 11913422912188432
17 160450066324972472
18 2181014117345997704
19 29894260817385950064
20 412839378639052110464

List of values

[1, 4, 24, 180, 1556, 14840, 152092, 1646652, 18613664, 217852008, 2623657384, 32361812912, 407342311632, 5217211974832, 67836910362772, 893766246630572, 11913422912188432, 160450066324972472, 2181014117345997704, 29894260817385950064, 412839378639052110464]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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