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.

A284195 Number of n X 4 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Table of values

n a(n)
1 6
2 40
3 412
4 5268
5 71181
6 1001047
7 14392557
8 210449237
9 3113715736
10 46513546197
11 700181791562
12 10607318574496
13 161549350874286
14 2471455506147877
15 37954136853757557
16 584775548813145717
17 9035444086858648868

List of values

[6, 40, 412, 5268, 71181, 1001047, 14392557, 210449237, 3113715736, 46513546197, 700181791562, 10607318574496, 161549350874286, 2471455506147877, 37954136853757557, 584775548813145717, 9035444086858648868]

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

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