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.

A255631 Number of n-length words on {0,1,2,3} avoiding runs of zeros of length 1 (mod 3).

Table of values

n a(n)
0 1
1 3
2 10
3 34
4 114
5 382
6 1282
7 4302
8 14434
9 48430
10 162498
11 545230
12 1829410
13 6138222
14 20595586
15 69104398
16 231866082
17 777980590
18 2610359362
19 8758542414
20 29387549602
21 98604086254
22 330846428418
23 1110089483662
24 3724684796002
25 12497440101678
26 41932678239682

List of values

[1, 3, 10, 34, 114, 382, 1282, 4302, 14434, 48430, 162498, 545230, 1829410, 6138222, 20595586, 69104398, 231866082, 777980590, 2610359362, 8758542414, 29387549602, 98604086254, 330846428418, 1110089483662, 3724684796002, 12497440101678, 41932678239682]

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

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