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.

A293102 Number of 3 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.

Table of values

n a(n)
1 0
2 5
3 48
4 567
5 3619
6 29952
7 205195
8 1668655
9 11923187
10 95858790
11 705043648
12 5616676646
13 42133302832
14 333647307242
15 2537702957116
16 20021680973470
17 153782369918531
18 1210816646023012
19 9365720486918309
20 73671711375313024

List of values

[0, 5, 48, 567, 3619, 29952, 205195, 1668655, 11923187, 95858790, 705043648, 5616676646, 42133302832, 333647307242, 2537702957116, 20021680973470, 153782369918531, 1210816646023012, 9365720486918309, 73671711375313024]

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

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