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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.

A200465 Number of 0..4 arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo 5.

Table of values

n a(n)
1 5
2 15
3 45
4 135
5 405
6 1213
7 3627
8 10846
9 32429
10 96970
11 289870
12 866499
13 2590128
14 7742621
15 23144448
16 69183744
17 206804024
18 618180094
19 1847865864
20 5523643627
21 16511274210
22 49355507149
23 147533484214
24 441007079909
25 1318258258809

List of values

[5, 15, 45, 135, 405, 1213, 3627, 10846, 32429, 96970, 289870, 866499, 2590128, 7742621, 23144448, 69183744, 206804024, 618180094, 1847865864, 5523643627, 16511274210, 49355507149, 147533484214, 441007079909, 1318258258809]

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

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