cp's OEIS Frontend

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.

A221439 Hilltop maps: number of n X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 n X n array.

Table of values

n a(n)
1 1
2 9
3 221
4 18393
5 6415089
6 8569227073
7 43045366565233
8 827667742380908273
9 60943705772313538144913
10 17137605013408451421126281145
11 18409652574456111249919293718583541

List of values

[1, 9, 221, 18393, 6415089, 8569227073, 43045366565233, 827667742380908273, 60943705772313538144913, 17137605013408451421126281145, 18409652574456111249919293718583541]

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

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