A298777 - OEIS

A298777

Number of nX3 0..1 arrays with every element equal to 0, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

1, 1, 6, 2, 4, 7, 8, 15, 23, 38, 61, 99, 160, 259, 419, 678, 1097, 1775, 2872, 4647, 7519, 12166, 19685, 31851, 51536, 83387, 134923, 218310, 353233, 571543, 924776, 1496319, 2421095, 3917414, 6338509, 10255923, 16594432, 26850355, 43444787

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OFFSET

1,3

COMMENTS

Column 3 of A298782.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-2) for n>7

EXAMPLE

All solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298782.

Sequence in context: A202244 A257535 A020831 * A156590 A135617 A019930

Adjacent sequences: A298774 A298775 A298776 * A298778 A298779 A298780

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2018

STATUS

approved