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A284765 Number of n X 2 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1. 2
0, 4, 14, 52, 206, 772, 2896, 10996, 41862, 159836, 612572, 2354880, 9076852, 35073264, 135823868, 527012084, 2048410070, 7974173484, 31085538148, 121332433984, 474123211448, 1854631573500, 7261693567782, 28457603057044 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A284771.

LINKS

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

EXAMPLE

Some solutions for n=4

..0..1. .0..0. .0..1. .0..0. .0..1. .1..0. .1..0. .1..0. .1..1. .0..1

..0..0. .0..0. .0..0. .1..0. .1..0. .1..0. .0..1. .0..1. .0..0. .0..0

..0..0. .0..1. .1..0. .0..0. .1..0. .0..0. .0..0. .1..0. .0..0. .0..1

..1..1. .1..0. .1..1. .1..1. .0..0. .1..0. .0..1. .0..0. .0..1. .1..0

CROSSREFS

Cf. A284771.

Sequence in context: A052710 A262594 A345242 * A129997 A308023 A149489

Adjacent sequences:  A284762 A284763 A284764 * A284766 A284767 A284768

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 02 2017

STATUS

approved

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Last modified May 18 10:28 EDT 2022. Contains 353807 sequences. (Running on oeis4.)