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.

A208469 Number of 4Xn nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

n a(n)
1 15
2 4140
3 4150760
4 10318694804
5 50996571454200
6 440379403449903222
7 6092197983646590702604

List of values

[15, 4140, 4150760, 10318694804, 50996571454200, 440379403449903222, 6092197983646590702604]

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

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