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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.

A257084 G.f. A(x) satisfies A(F(x)) = x, where F(x) is the g.f. of A251690.

Table of values

n a(n)
1 1
2 1
3 4
4 17
5 80
6 407
7 2160
8 11859
9 66754
10 383210
11 2234921
12 13204685
13 78870454
14 475453371
15 2888991879
16 17675743626
17 108801199823
18 673302178725
19 4186513098755
20 26142455226568
21 163873586066647
22 1030820865387599
23 6504789754356175
24 41166205256238155
25 261217480924768212
26 1661598566523216015

List of values

[1, 1, 4, 17, 80, 407, 2160, 11859, 66754, 383210, 2234921, 13204685, 78870454, 475453371, 2888991879, 17675743626, 108801199823, 673302178725, 4186513098755, 26142455226568, 163873586066647, 1030820865387599, 6504789754356175, 41166205256238155, 261217480924768212, 1661598566523216015]

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

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