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.

A271035 Number of 3 X 3 X 3 triangular 0..n arrays with some element less than a w, nw or ne neighbor exactly once.

Table of values

n a(n)
1 10
2 72
3 294
4 896
5 2268
6 5040
7 10164
8 19008
9 33462
10 56056
11 90090
12 139776
13 210392
14 308448
15 441864
16 620160
17 854658
18 1158696
19 1547854
20 2040192
21 2656500
22 3420560
23 4359420
24 5503680
25 6887790
26 8550360
27 10534482
28 12888064
29 15664176
30 18921408

List of values

[10, 72, 294, 896, 2268, 5040, 10164, 19008, 33462, 56056, 90090, 139776, 210392, 308448, 441864, 620160, 854658, 1158696, 1547854, 2040192, 2656500, 3420560, 4359420, 5503680, 6887790, 8550360, 10534482, 12888064, 15664176, 18921408]

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

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