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.

A193273 Number of n X n symmetric 0..7 arrays with no element equal to any horizontal or vertical neighbor and with new values 0..7 introduced in lower triangular row major order.

Table of values

n a(n)
1 1
2 2
3 42
4 12806
5 71531470
6 4359452409293
7 1840118598465187309
8 4839010680027431179628037
9 78256880677789721019902991767596

List of values

[1, 2, 42, 12806, 71531470, 4359452409293, 1840118598465187309, 4839010680027431179628037, 78256880677789721019902991767596]

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

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