cp's OEIS Frontend

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.

A138739 G.f. A(x) satisfies: A(A(x)) = 3*A(x) - 2*x - x^2 with A(0)=0.

Table of values

n a(n)
1 1
2 1
3 2
4 11
5 88
6 888
7 10572
8 143214
9 2159154
10 35702442
11 640873656
12 12394383780
13 256762580460
14 5671209169168
15 133041670286160
16 3304034094162183
17 86616702087692256
18 2390831825522972392
19 69323685702986714272
20 2107073248164657741448
21 67003070810599639419680
22 2225053954972969636237280
23 77034579373254666948386880
24 2776183496539544726567249520

List of values

[1, 1, 2, 11, 88, 888, 10572, 143214, 2159154, 35702442, 640873656, 12394383780, 256762580460, 5671209169168, 133041670286160, 3304034094162183, 86616702087692256, 2390831825522972392, 69323685702986714272, 2107073248164657741448, 67003070810599639419680, 2225053954972969636237280, 77034579373254666948386880, 2776183496539544726567249520]

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

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