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.

A203978 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order.

Table of values

n a(n)
1 6
2 144
3 7776
4 956448
5 271918944
6 180709558848
7 281455764775776
8 1031010515432951328
9 8894627860916158754400
10 180980943906416856129607680

List of values

[6, 144, 7776, 956448, 271918944, 180709558848, 281455764775776, 1031010515432951328, 8894627860916158754400, 180980943906416856129607680]

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

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