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A299663 Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 2
4, 31, 179, 1080, 6585, 40023, 243312, 1479656, 8997567, 54712960, 332705597, 2023155240, 12302638210, 74811344202, 454921691740, 2766341737943, 16821898891161, 102292597556417, 622032957080238, 3782531767515293 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A299668.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +6*a(n-2) +10*a(n-3) -29*a(n-4) -59*a(n-5) -27*a(n-6) -46*a(n-7) +21*a(n-8) -8*a(n-9) +52*a(n-10) -16*a(n-11) for n>12

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299668.

Sequence in context: A270670 A270669 A298996 * A005216 A124033 A014537

Adjacent sequences:  A299660 A299661 A299662 * A299664 A299665 A299666

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 15 2018

STATUS

approved

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Last modified August 22 00:43 EDT 2019. Contains 326169 sequences. (Running on oeis4.)