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A300367 Number of nX3 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
0, 1, 0, 3, 3, 8, 16, 32, 70, 135, 293, 585, 1221, 2496, 5156, 10609, 21818, 44955, 92476, 190459, 391929, 806935, 1660946, 3419147, 7038323, 14488296, 29824518, 61393333, 126379174, 260151058, 535522942, 1102374986, 2269243610, 4671246404 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 3 of A300372.

LINKS

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

FORMULA

Empirical: a(n) = a(n-2) +2*a(n-3) +5*a(n-4) +6*a(n-5) +4*a(n-6) +6*a(n-7) +a(n-8) -a(n-12) +2*a(n-13) -a(n-14)

EXAMPLE

All solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300372.

Sequence in context: A219349 A208964 A104864 * A296106 A329094 A327327

Adjacent sequences:  A300364 A300365 A300366 * A300368 A300369 A300370

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 04 2018

STATUS

approved

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Last modified December 7 05:14 EST 2019. Contains 329839 sequences. (Running on oeis4.)