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.

A279285 Self-composition of the Pell numbers; g.f.: A(x) = G(G(x)), where G(x) = g.f. of A000129.

Table of values

n a(n)
0 0
1 1
2 4
3 18
4 82
5 377
6 1740
7 8045
8 37226
9 172314
10 797744
11 3693493
12 17101128
13 79180525
14 366618808
15 1697509962
16 7859781454
17 36392245541
18 168502887396
19 780199897985
20 3612471696230
21 16726421117538
22 77446465948772
23 358591660029577
24 1660346632032144
25 7687716275234809
26 35595568065121900
27 164814155562334914

List of values

[0, 1, 4, 18, 82, 377, 1740, 8045, 37226, 172314, 797744, 3693493, 17101128, 79180525, 366618808, 1697509962, 7859781454, 36392245541, 168502887396, 780199897985, 3612471696230, 16726421117538, 77446465948772, 358591660029577, 1660346632032144, 7687716275234809, 35595568065121900, 164814155562334914]

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

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