A207351 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.
42, 1764, 8928, 43260, 186002, 684324, 2367656, 8000806, 26057006, 82907430, 260627110, 806084422, 2476671718, 7545089216, 22861190904, 68993933764, 207422313718, 622180142516, 1862113694818, 5564560256320, 16608301418960
Offset: 1
Keywords
Examples
Some solutions for n=4 ..0..1..0..1....0..1..0..0....1..0..1..0....0..1..0..0....1..1..1..1 ..1..0..0..1....0..1..0..1....0..0..1..0....0..1..0..1....1..1..0..1 ..0..0..1..0....1..0..1..0....1..1..0..1....1..0..1..0....0..0..1..0 ..1..1..1..0....1..0..0..1....1..0..1..0....1..1..1..0....1..1..1..1 ..1..0..0..1....0..1..0..1....0..1..0..0....0..1..0..1....0..1..0..1 ..0..1..0..1....1..0..1..0....1..0..0..1....1..0..0..1....0..0..1..0 ..0..0..1..0....1..1..0..1....1..0..1..0....0..0..1..0....1..1..1..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Comments