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.

A208857 Number of n X n 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors.

Table of values

n a(n)
1 1
2 11
3 5796
4 44452082
5 4071491223248
6 4445765748006060562
7 57867813487534623493632032
8 8978812485595759770697498996138448

List of values

[1, 11, 5796, 44452082, 4071491223248, 4445765748006060562, 57867813487534623493632032, 8978812485595759770697498996138448]

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

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