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.

A208387 Number of nX3 0..2 arrays with new values 0..2 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 5
2 117
3 3042
4 79092
5 2056392
6 53466192
7 1390120992
8 36143145792
9 939721790592
10 24432766555392
11 635251930440192
12 16516550191444992
13 429430304977569792
14 11165187929416814592
15 290294886164837179392
16 7547667040285766664192

List of values

[5, 117, 3042, 79092, 2056392, 53466192, 1390120992, 36143145792, 939721790592, 24432766555392, 635251930440192, 16516550191444992, 429430304977569792, 11165187929416814592, 290294886164837179392, 7547667040285766664192]

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

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