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.

A221539 Number of 0..5 arrays of length n with each element differing from at least one neighbor by something other than 1, starting with 0.

Table of values

n a(n)
1 0
2 5
3 22
4 130
5 716
6 4018
7 22466
8 125701
9 703193
10 3933916
11 22007609
12 123117952
13 688762928
14 3853170001
15 21555920345
16 120591020698
17 674626461416
18 3774085830607
19 21113497129178
20 118115957356066
21 660780130205831

List of values

[0, 5, 22, 130, 716, 4018, 22466, 125701, 703193, 3933916, 22007609, 123117952, 688762928, 3853170001, 21555920345, 120591020698, 674626461416, 3774085830607, 21113497129178, 118115957356066, 660780130205831]

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

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