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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.

A219082 Hilltop maps: number of 5Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 5Xn array.

Table of values

n a(n)
1 1
2 547
3 18499
4 477309
5 14228041
6 433704331
7 12998933707
8 389034040749
9 11664778284009
10 349775255769979
11 10486116624897067
12 314370999692984261
13 9424956803519213353
14 282563157923689218059
15 8471313961048080841195

List of values

[1, 547, 18499, 477309, 14228041, 433704331, 12998933707, 389034040749, 11664778284009, 349775255769979, 10486116624897067, 314370999692984261, 9424956803519213353, 282563157923689218059, 8471313961048080841195]

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

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