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 A305484 Number of n X 3 0..1 arrays with every element unequal to 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero. 1
 1, 14, 19, 27, 137, 295, 570, 2026, 4727, 10623, 31695, 77554, 186678, 514389, 1288865, 3207903, 8513828, 21596662, 54628207, 142471209, 363676271, 927239206, 2398775556, 6143042745, 15724343029, 40529736309, 103968954572, 266660435630 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 3 of A305489. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +4*a(n-2) +11*a(n-3) -9*a(n-4) -39*a(n-5) -31*a(n-6) -4*a(n-7) +37*a(n-8) +19*a(n-9) +18*a(n-10) -2*a(n-11) -4*a(n-12) -16*a(n-13) -8*a(n-14) for n>16. EXAMPLE Some solutions for n=5 ..0..1..1. .0..1..1. .0..1..1. .0..0..0. .0..0..0. .0..1..1. .0..0..0 ..0..1..0. .0..0..1. .0..1..0. .0..1..0. .0..1..0. .0..0..1. .1..1..1 ..0..0..0. .1..1..1. .0..0..0. .0..0..0. .0..0..0. .0..0..0. .1..1..1 ..1..1..0. .0..1..1. .0..1..1. .0..1..0. .0..0..1. .0..1..0. .1..0..1 ..1..0..0. .0..0..1. .0..0..1. .0..1..1. .0..1..1. .0..0..0. .0..1..0 CROSSREFS Cf. A305489. Sequence in context: A028396 A120158 A292614 * A130792 A121235 A007629 Adjacent sequences: A305481 A305482 A305483 * A305485 A305486 A305487 KEYWORD nonn AUTHOR R. H. Hardin, Jun 02 2018 STATUS approved

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Last modified November 30 05:42 EST 2023. Contains 367454 sequences. (Running on oeis4.)