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.

A268739 Number of nX7 binary arrays with some 1 horizontally or vertically adjacent to some other 1 exactly once.

Table of values

n a(n)
1 38
2 1183
3 33170
4 816009
5 18847982
6 418632185
7 9039552112
8 191307160577
9 3985770068310
10 82030747371058
11 1671509767296774
12 33781019022038039
13 678004335124666334
14 13528033902348727292
15 268553181861956273470

List of values

[38, 1183, 33170, 816009, 18847982, 418632185, 9039552112, 191307160577, 3985770068310, 82030747371058, 1671509767296774, 33781019022038039, 678004335124666334, 13528033902348727292, 268553181861956273470]