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.

A284215 Number of n X n 0..1 arrays with the number of 1's horizontally or antidiagonally 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 1
2 6
3 70
4 6511
5 2417194
6 3945536189
7 26772321109067
8 749608559151363940
9 85781667864838421304454
10 39910247433142071128719168435
11 75224282551539452957156354090109083

List of values

[1, 6, 70, 6511, 2417194, 3945536189, 26772321109067, 749608559151363940, 85781667864838421304454, 39910247433142071128719168435, 75224282551539452957156354090109083]

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

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