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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.

A185010 a(n) = A000108(n)*A015518(n+1), where A000108 are the Catalan numbers and A015518(n) = 2*A015518(n-1) + 3*A015518(n-2).

Table of values

n a(n)
0 1
1 2
2 14
3 100
4 854
5 7644
6 72204
7 703560
8 7037030
9 71772844
10 743844452
11 7810307960
12 82909630972
13 888316731800
14 9593823377880
15 104332819539600
16 1141523825614470
17 12556761952114380
18 138785264158902900
19 1540516430396559000
20 17165754516697206420
21 191944345934966132040

List of values

[1, 2, 14, 100, 854, 7644, 72204, 703560, 7037030, 71772844, 743844452, 7810307960, 82909630972, 888316731800, 9593823377880, 104332819539600, 1141523825614470, 12556761952114380, 138785264158902900, 1540516430396559000, 17165754516697206420, 191944345934966132040]

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

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