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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.

A218168 G.f. satisfies: A(x) = 1 + x*[d/dx x*A(x)^3]/A(x)^4.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 16
5 77
6 630
7 7956
8 132480
9 2664389
10 62140078
11 1643056625
12 48503833280
13 1580192424580
14 56292381309608
15 2176251789724500
16 90726545080501440
17 4056755120695005717
18 193649641793538259950
19 9828338731644277922679
20 528459404673048692682384

List of values

[1, 1, 2, 5, 16, 77, 630, 7956, 132480, 2664389, 62140078, 1643056625, 48503833280, 1580192424580, 56292381309608, 2176251789724500, 90726545080501440, 4056755120695005717, 193649641793538259950, 9828338731644277922679, 528459404673048692682384]

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

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