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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.

A221452 Hilltop maps: number of 7Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 7Xn array.

Table of values

n a(n)
1 1
2 4063
3 437437
4 36364977
5 3888200065
6 414116287743
7 43045366565233
8 4487793927664209
9 468786655087266657
10 48944887790539796639
11 5109638176609475597301
12 533452901877309087321537

List of values

[1, 4063, 437437, 36364977, 3888200065, 414116287743, 43045366565233, 4487793927664209, 468786655087266657, 48944887790539796639, 5109638176609475597301, 533452901877309087321537]

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

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