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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.

A203539 Number of n X 5 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1.

Table of values

n a(n)
1 0
2 64
3 1840
4 30976
5 1700580
6 46485124
7 1680210240
8 56191754304
9 1898704490980
10 64488576908484
11 2178774976790208
12 73775014607038096
13 2496772163852959252
14 84495658280798176036
15 2859840508384744419504
16 96787655134946736339600
17 3275732831885874026239020
18 110865235815215020663937284

List of values

[0, 64, 1840, 30976, 1700580, 46485124, 1680210240, 56191754304, 1898704490980, 64488576908484, 2178774976790208, 73775014607038096, 2496772163852959252, 84495658280798176036, 2859840508384744419504, 96787655134946736339600, 3275732831885874026239020, 110865235815215020663937284]

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

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