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.

A271029 Number of nXnXn triangular 0..3 arrays with some element less than a w, nw or ne neighbor exactly once.

Table of values

n a(n)
1 0
2 20
3 294
4 3114
5 29120
6 256020
7 2173554
8 18060096
9 147976270
10 1201034302
11 9684108034
12 77719446198
13 621623562780
14 4959585660212
15 39496945637162
16 314112558505488
17 2495519478658458
18 19810840820555514
19 157179628657888198

List of values

[0, 20, 294, 3114, 29120, 256020, 2173554, 18060096, 147976270, 1201034302, 9684108034, 77719446198, 621623562780, 4959585660212, 39496945637162, 314112558505488, 2495519478658458, 19810840820555514, 157179628657888198]

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

Content is available under The OEIS End-User License Agreement.