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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.

A351057 G.f. A(x) satisfies: A(x) = 1 + x + x^2 * A(x/(1 - 6*x)) / (1 - 6*x).

Table of values

n a(n)
0 1
1 1
2 1
3 7
4 49
5 349
6 2593
7 20755
8 184609
9 1851289
10 20735041
11 253471039
12 3310505425
13 45630322741
14 660993079393
15 10065000586507
16 161262522401089
17 2717539655666353
18 48053169836707969
19 888408313419305719
20 17108882037936283249
21 342144175940842590349
22 7089944927940141776545

List of values

[1, 1, 1, 7, 49, 349, 2593, 20755, 184609, 1851289, 20735041, 253471039, 3310505425, 45630322741, 660993079393, 10065000586507, 161262522401089, 2717539655666353, 48053169836707969, 888408313419305719, 17108882037936283249, 342144175940842590349, 7089944927940141776545]

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

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