A284107 Number of n X 2 0..1 arrays with the number of 1's king-move adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

2, 4, 13, 46, 160, 571, 2095, 7802, 29326, 111040, 422862, 1617611, 6210935, 23922207, 92387315, 357629430, 1387192894, 5390374430, 20979391112, 81768490420, 319107181678, 1246785919174, 4876478734046, 19091509694075

Offset

1,1

Comments

Column 2 of A284113.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..0..1. .0..1. .0..1. .0..0. .0..0. .0..0. .0..1. .0..1. .0..0. .0..1
..0..0. .1..0. .0..1. .1..1. .1..0. .1..1. .1..0. .1..1. .0..1. .0..1
..1..1. .1..0. .1..0. .1..1. .1..1. .1..1. .1..0. .1..0. .1..1. .1..0
..1..1. .0..1. .1..0. .1..1. .1..1. .0..0. .1..0. .0..0. .0..1. .0..1

Crossrefs

Cf. A284113.

Sequence in context: A300931 A286074 A153930 * A184177 A005164 A246494

Adjacent sequences: A284104 A284105 A284106 * A284108 A284109 A284110

Keyword

nonn

Author

R. H. Hardin, Mar 20 2017

Status

approved