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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
OFFSET
1,2
COMMENTS
Diagonal of A301790.
LINKS
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: A361224 A327323 A192303 * A066280 A333886 A192243
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 26 2018
STATUS
approved