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.

A274005 Number of length-n binary sequences where the sum of each subblock differs by at most 2 from every other subblock of the same length.

Table of values

n a(n)
0 1
1 2
2 4
3 8
4 16
5 32
6 62
7 120
8 222
9 410
10 728
11 1294
12 2220
13 3816
14 6380
15 10690
16 17486
17 28704
18 46180
19 74464
20 118226
21 188158
22 295062
23 464146
24 721500
25 1123384
26 1731646
27 2676538
28 4094776
29 6279380
30 9562698
31 14563312
32 22043302
33 33433502
34 50357062
35 75988618
36 114092544

List of values

[1, 2, 4, 8, 16, 32, 62, 120, 222, 410, 728, 1294, 2220, 3816, 6380, 10690, 17486, 28704, 46180, 74464, 118226, 188158, 295062, 464146, 721500, 1123384, 1731646, 2676538, 4094776, 6279380, 9562698, 14563312, 22043302, 33433502, 50357062, 75988618, 114092544]

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

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