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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.

A228470 a(n) = 6*a(n-2) + a(n-4), where a(0) = 3, a(1) = 11, a(2) = 18, a(3) = 68.

Table of values

n a(n)
0 3
1 11
2 18
3 68
4 111
5 419
6 684
7 2582
8 4215
9 15911
10 25974
11 98048
12 160059
13 604199
14 986328
15 3723242
16 6078027
17 22943651
18 37454490
19 141385148
20 230804967
21 871254539
22 1422284292
23 5368912382
24 8764510719
25 33084728831
26 54009348606
27 203877285368
28 332820602355

List of values

[3, 11, 18, 68, 111, 419, 684, 2582, 4215, 15911, 25974, 98048, 160059, 604199, 986328, 3723242, 6078027, 22943651, 37454490, 141385148, 230804967, 871254539, 1422284292, 5368912382, 8764510719, 33084728831, 54009348606, 203877285368, 332820602355]

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

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