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.

A268957 Number of length-(n+3) 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 5
2 29
3 138
4 634
5 3045
6 15579
7 85314
8 498408
9 3092383
10 20286281
11 140153290
12 1016261974
13 7710988251
14 61062381647
15 503482376776
16 4313580705556
17 38328590370571
18 352618807558797
19 3353663977088616
20 32927374589861042

List of values

[5, 29, 138, 634, 3045, 15579, 85314, 498408, 3092383, 20286281, 140153290, 1016261974, 7710988251, 61062381647, 503482376776, 4313580705556, 38328590370571, 352618807558797, 3353663977088616, 32927374589861042]

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

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