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.

A019481 a(n) = 3*a(n-1) + a(n-2) - 2*a(n-3) (agrees with A019480 for n <= 19 only).

Table of values

n a(n)
0 4
1 12
2 37
3 115
4 358
5 1115
6 3473
7 10818
8 33697
9 104963
10 326950
11 1018419
12 3172281
13 9881362
14 30779529
15 95875387
16 298642966
17 930245227
18 2897627873
19 9025842914
20 28114666161
21 87574585651
22 272786737286
23 849705465187
24 2646753961545
25 8244393875250

List of values

[4, 12, 37, 115, 358, 1115, 3473, 10818, 33697, 104963, 326950, 1018419, 3172281, 9881362, 30779529, 95875387, 298642966, 930245227, 2897627873, 9025842914, 28114666161, 87574585651, 272786737286, 849705465187, 2646753961545, 8244393875250]

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

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