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A301785 Number of n X n 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
1, 5, 12, 32, 82, 205, 508, 1258, 3129, 7837, 19782, 50310, 128803, 331592, 857434, 2224726, 5787130, 15082283, 39360630, 102820286, 268777679, 702935723, 1839002254, 4812250428, 12594535285, 32965703404, 86292668280, 225894991484 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A301790.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..36

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301790.

Sequence in context: A038606 A327323 A192303 * A066280 A333886 A192243

Adjacent sequences:  A301782 A301783 A301784 * A301786 A301787 A301788

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 26 2018

STATUS

approved

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Last modified July 3 17:54 EDT 2022. Contains 355055 sequences. (Running on oeis4.)