A284164 Number of n X 7 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

33, 1689, 154108, 16699997, 1852406216, 213897742464, 25064817057781, 2981736353245523, 357844048109256955, 43278292532056389680, 5263990195553603263431, 643350359729498071977340

Offset

1,1

Comments

Column 7 of A284165.

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

Some solutions for n=3
..0..1..1..1..0..1..0. .0..1..0..0..1..1..1. .0..0..0..0..0..1..1
..0..1..1..0..0..1..1. .1..1..1..0..1..1..0. .0..0..0..1..1..0..0
..0..1..0..1..0..0..1. .0..0..1..0..0..1..0. .1..1..1..0..1..1..0

Crossrefs

Cf. A284165.

Sequence in context: A093756 A284333 A284198 * A330478 A284221 A264170

Adjacent sequences: A284161 A284162 A284163 * A284165 A284166 A284167

Keyword

nonn

Author

R. H. Hardin, Mar 21 2017

Status

approved