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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.

A289650 Number of n X 7 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

Table of values

n a(n)
1 3
2 2421
3 183390
4 25760875
5 2439241607
6 332113863074
7 35072966294346
8 4615203834449304
9 519140871714574338
10 66784349259505575111
11 7809000921229551589905
12 991318340748862385457430

List of values

[3, 2421, 183390, 25760875, 2439241607, 332113863074, 35072966294346, 4615203834449304, 519140871714574338, 66784349259505575111, 7809000921229551589905, 991318340748862385457430]

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

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