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.

A233077 Number of n X 3 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order.

Table of values

n a(n)
1 5
2 95
3 1985
4 41675
5 875165
6 18378455
7 385947545
8 8104898435
9 170202867125
10 3574260209615
11 75059464401905
12 1576248752439995
13 33101223801239885
14 695125699826037575
15 14597639696346789065
16 306550433623282570355

List of values

[5, 95, 1985, 41675, 875165, 18378455, 385947545, 8104898435, 170202867125, 3574260209615, 75059464401905, 1576248752439995, 33101223801239885, 695125699826037575, 14597639696346789065, 306550433623282570355]

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

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