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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.

A218425 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..1 nX7 array.

Table of values

n a(n)
1 57
2 11011
3 1207525
4 144597047
5 17270172871
6 2058493362799
7 245489633250861
8 29274579482710357
9 3490981608801331021
10 416298960473587173025
11 49643559085814354624329
12 5919983699927241114279393

List of values

[57, 11011, 1207525, 144597047, 17270172871, 2058493362799, 245489633250861, 29274579482710357, 3490981608801331021, 416298960473587173025, 49643559085814354624329, 5919983699927241114279393]

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

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