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.

A268958 Number of length-(n+4) 0..n arrays with no repeated value equal to the previous repeated value, with new values introduced in sequential order.

Table of values

n a(n)
1 7
2 77
3 499
4 2785
5 15124
6 84572
7 497262
8 3090688
9 20283861
10 140149935
11 1016257437
12 7710982245
13 61062373842
14 503482366796
15 4313580692976
16 38328590354914
17 352618807539531
18 3353663977065151
19 32927374589832727
20 333319732348780989

List of values

[7, 77, 499, 2785, 15124, 84572, 497262, 3090688, 20283861, 140149935, 1016257437, 7710982245, 61062373842, 503482366796, 4313580692976, 38328590354914, 352618807539531, 3353663977065151, 32927374589832727, 333319732348780989]

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

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