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.

A280677 Number of 5Xn 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 41
2 4568
3 181640
4 9439606
5 474736149
6 23952262535
7 1208240638772
8 60949510593245
9 3074564570571027
10 155095359625755139
11 7823728447342567501
12 394665220545896300250
13 19908746786901511218365
14 1004289676988490253656371

List of values

[41, 4568, 181640, 9439606, 474736149, 23952262535, 1208240638772, 60949510593245, 3074564570571027, 155095359625755139, 7823728447342567501, 394665220545896300250, 19908746786901511218365, 1004289676988490253656371]

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

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