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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.

A209734 1/4 the number of (n+1)X7 0..3 arrays with every 2X2 subblock having distinct edge sums.

Table of values

n a(n)
1 123480
2 6933120
3 420545824
4 27425792944
5 1809791149768
6 121396901813560
7 8142073013529816
8 548770608436244800
9 36942499122761432872
10 2491439485029085248096
11 167889440702169327824712

List of values

[123480, 6933120, 420545824, 27425792944, 1809791149768, 121396901813560, 8142073013529816, 548770608436244800, 36942499122761432872, 2491439485029085248096, 167889440702169327824712]

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

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