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 A283544 Number of 3 X n 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors. 1
 8, 33, 127, 578, 2369, 10069, 42664, 179733, 760763, 3213450, 13579341, 57391993, 242514480, 1024873889, 4331011439, 18302393274, 77344545761, 326850602229, 1381241865984, 5837004969349, 24666656653675, 104239090222066 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A283543. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 2*a(n-1) +7*a(n-2) +11*a(n-3) -6*a(n-4) +11*a(n-5) -2*a(n-6). Empirical: G.f.: -x*( -8 -17*x -5*x^2 -5*x^3 -9*x^4 +2*x^5)/ (1 -2*x -7*x^2 -11*x^3 +6*x^4 -11*x^5 +2*x^6). - R. J. Mathar, Mar 11 2017 EXAMPLE Some solutions for n=4 ..0..1..0..1. .0..1..0..1. .1..1..0..0. .1..1..0..1. .0..1..0..0 ..0..0..0..0. .1..0..0..0. .0..0..0..1. .0..0..0..0. .0..0..0..0 ..1..0..0..1. .1..0..1..0. .1..0..1..0. .1..0..1..1. .0..1..0..0 CROSSREFS Cf. A283543. Sequence in context: A087235 A222346 A317017 * A212404 A048877 A349101 Adjacent sequences: A283541 A283542 A283543 * A283545 A283546 A283547 KEYWORD nonn AUTHOR R. H. Hardin, Mar 10 2017 STATUS approved

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Last modified May 20 06:19 EDT 2024. Contains 372703 sequences. (Running on oeis4.)