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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.

A219077 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 nX7 array.

Table of values

n a(n)
1 57
2 9367
3 1023441
4 113959413
5 12998933707
6 1473655240387
7 167024618548071
8 18939932662217929
9 2147519964457580465
10 243494396494378271955
11 27608646901560676777421
12 3130407281278669890215213

List of values

[57, 9367, 1023441, 113959413, 12998933707, 1473655240387, 167024618548071, 18939932662217929, 2147519964457580465, 243494396494378271955, 27608646901560676777421, 3130407281278669890215213]

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

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