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.

A221449 Hilltop maps: number of 4Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 4Xn array.

Table of values

n a(n)
1 1
2 105
3 1473
4 18393
5 260557
6 3669101
7 51186449
8 715191073
9 9997750841
10 139736151537
11 1953034926537
12 27297122633073
13 381525299372673
14 5332483219348113
15 74530789226270781
16 1041698296419651789

List of values

[1, 105, 1473, 18393, 260557, 3669101, 51186449, 715191073, 9997750841, 139736151537, 1953034926537, 27297122633073, 381525299372673, 5332483219348113, 74530789226270781, 1041698296419651789]

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

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