

A297602


Number of nX3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 3 neighboring 1s.


1



7, 35, 181, 953, 4997, 26155, 137033, 717905, 3760657, 19700359, 103201589, 540625665, 2832090849, 14836035579, 77719229889, 407135626281, 2132798039801, 11172757117047, 58528983567693, 306606675825193, 1606172667510097
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OFFSET

1,1


COMMENTS

Column 3 of A297607.


LINKS

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


FORMULA

Empirical: a(n) = 5*a(n1) a(n2) +19*a(n3) 36*a(n4) 62*a(n6) +62*a(n7) +24*a(n8) +4*a(n9) 40*a(n10) 32*a(n11)


EXAMPLE

Some solutions for n=7
..0..0..0. .1..0..1. .0..0..0. .1..0..0. .1..0..1. .1..0..1. .0..0..0
..1..0..1. .1..0..0. .1..0..1. .0..0..0. .0..0..0. .0..0..0. .1..0..0
..1..0..1. .1..0..1. .1..0..1. .0..0..1. .0..0..1. .0..0..0. .1..0..1
..0..0..0. .0..1..1. .1..0..0. .0..0..1. .0..1..0. .0..0..0. .0..0..0
..0..1..0. .0..0..0. .1..0..0. .0..0..1. .0..1..0. .0..1..1. .1..0..1
..0..0..1. .1..0..0. .1..1..0. .1..0..0. .0..1..0. .1..0..1. .0..0..1
..0..0..1. .0..0..1. .1..0..0. .1..0..1. .0..1..0. .0..0..0. .1..1..1


CROSSREFS

Cf. A297607.
Sequence in context: A037506 A037689 A051926 * A289991 A295248 A295647
Adjacent sequences: A297599 A297600 A297601 * A297603 A297604 A297605


KEYWORD

nonn


AUTHOR

R. H. Hardin, Jan 01 2018


STATUS

approved



