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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.

A280359 Number of nX4 0..2 arrays with no element equal to more than one of its horizontal and vertical neighbors and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 11
2 285
3 6727
4 164326
5 3992071
6 97147710
7 2363431872
8 57503068637
9 1399048151083
10 34038954765446
11 828169917765970
12 20149430911202735
13 490237018170118357
14 11927499978469804063
15 290196884767995060095

List of values

[11, 285, 6727, 164326, 3992071, 97147710, 2363431872, 57503068637, 1399048151083, 34038954765446, 828169917765970, 20149430911202735, 490237018170118357, 11927499978469804063, 290196884767995060095]

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

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