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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.

A344191 a(n) = Catalan(n) * (n^2 + 2) / (n + 2).

Table of values

n a(n)
0 1
1 1
2 3
3 11
4 42
5 162
6 627
7 2431
8 9438
9 36686
10 142766
11 556206
12 2169268
13 8469060
14 33096195
15 129454695
16 506793270
17 1985612310
18 7785510810
19 30548406570
20 119944382220
21 471241577820
22 1852521913710
23 7286586193926
24 28675561428972
25 112905199767052
26 444752335104252

List of values

[1, 1, 3, 11, 42, 162, 627, 2431, 9438, 36686, 142766, 556206, 2169268, 8469060, 33096195, 129454695, 506793270, 1985612310, 7785510810, 30548406570, 119944382220, 471241577820, 1852521913710, 7286586193926, 28675561428972, 112905199767052, 444752335104252]

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

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