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A299123 Number of nX3 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 1
3, 4, 9, 23, 31, 184, 427, 1115, 4128, 11024, 32827, 104959, 302093, 917104, 2804565, 8324555, 25231517, 76267810, 228857830, 691699768, 2085676297, 6280152762, 18952185100, 57128981249, 172189537544, 519305913429, 1565482526696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A299128.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +4*a(n-2) +16*a(n-3) -13*a(n-4) -35*a(n-5) -62*a(n-6) +28*a(n-7) +65*a(n-8) +36*a(n-9) +61*a(n-10) +59*a(n-11) -34*a(n-12) -64*a(n-13) -36*a(n-14) -40*a(n-15) +3*a(n-16) +18*a(n-17) +2*a(n-18) for n>19

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299128.

Sequence in context: A049976 A032789 A089243 * A245455 A296265 A034921

Adjacent sequences:  A299120 A299121 A299122 * A299124 A299125 A299126

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 03 2018

STATUS

approved

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Last modified May 24 11:23 EDT 2019. Contains 323529 sequences. (Running on oeis4.)