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A298384 Number of nX3 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. 2
1, 18, 56, 223, 849, 3387, 13075, 51006, 199243, 777845, 3035261, 11848853, 46252538, 180542983, 704739373, 2750937235, 10738195965, 41916200522, 163618636603, 638680511133, 2493070208921, 9731625088447, 37987108531520 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A298389.

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +4*a(n-3) -17*a(n-4) -25*a(n-5) +23*a(n-6) +33*a(n-7) +41*a(n-8) -145*a(n-9) -147*a(n-10) +24*a(n-11) +384*a(n-12) +267*a(n-13) -72*a(n-14) -207*a(n-15) -61*a(n-16) +51*a(n-17) +10*a(n-18) -14*a(n-19) -4*a(n-20) for n>21

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A298389.

Sequence in context: A044975 A251252 A297946 * A298765 A299460 A155155

Adjacent sequences:  A298381 A298382 A298383 * A298385 A298386 A298387

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2018

STATUS

approved

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Last modified September 29 03:50 EDT 2022. Contains 357082 sequences. (Running on oeis4.)