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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.

A098619 G.f. A(x) satisfies: A(x*G098618(x)) = G098618(x), where G098618 is the g.f. for A098618(n) = A007482(n)*Catalan(n).

Table of values

n a(n)
0 1
1 3
2 13
3 51
4 213
5 867
6 3589
7 14739
8 60853
9 250563
10 1033605
11 4259571
12 17565909
13 72412707
14 298586661
15 1231016019
16 5075753589
17 20927272323
18 86286346693
19 355763629491
20 1466857936405
21 6047981701347
22 24936516122469
23 102815688922899
24 423920292507061
25 1747866711689283
26 7206641564551429

List of values

[1, 3, 13, 51, 213, 867, 3589, 14739, 60853, 250563, 1033605, 4259571, 17565909, 72412707, 298586661, 1231016019, 5075753589, 20927272323, 86286346693, 355763629491, 1466857936405, 6047981701347, 24936516122469, 102815688922899, 423920292507061, 1747866711689283, 7206641564551429]

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

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