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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.

A069405 Half the number of n X 5 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.

Table of values

n a(n)
1 15
2 285
3 4541
4 66579
5 944157
6 13182673
7 182702967
8 2522968803
9 34777826197
10 478971480223
11 6593672923115
12 90751017499077
13 1248904863846397
14 17186379018703213
15 236498372271010941
16 3254365880309197587
17 44781833050605593997
18 616220311429717310963

List of values

[15, 285, 4541, 66579, 944157, 13182673, 182702967, 2522968803, 34777826197, 478971480223, 6593672923115, 90751017499077, 1248904863846397, 17186379018703213, 236498372271010941, 3254365880309197587, 44781833050605593997, 616220311429717310963]

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

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