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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.

A256272 G.f.: Sum_{n>=1} Pell(n+1) * x^n / (1 - x^n), where Pell(n) = A000129(n).

Table of values

n a(n)
1 2
2 7
3 14
4 36
5 72
6 188
7 410
8 1021
9 2392
10 5818
11 13862
12 33678
13 80784
14 195440
15 470916
16 1137710
17 2744212
18 6627675
19 15994430
20 38619812
21 93222780
22 225072548
23 543339722
24 1311772784
25 3166816034
26 7645450834
27 18457558444
28 44560677618
29 107578520352
30 259717999680
31 627013566050
32 1513745792655
33 3654502889812

List of values

[2, 7, 14, 36, 72, 188, 410, 1021, 2392, 5818, 13862, 33678, 80784, 195440, 470916, 1137710, 2744212, 6627675, 15994430, 38619812, 93222780, 225072548, 543339722, 1311772784, 3166816034, 7645450834, 18457558444, 44560677618, 107578520352, 259717999680, 627013566050, 1513745792655, 3654502889812]

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

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