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 A240365 Number of 2Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4 1
 4, 15, 51, 188, 672, 2452, 8822, 32077, 115811, 420299, 1519980, 5510943, 19945570, 72279704, 261698918, 948113920, 3433420924, 12437397618, 45043913721, 163158785746, 590931290044, 2140411544446, 7752356423111, 28079348085009 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A240364 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 3*a(n-1) +9*a(n-2) -23*a(n-3) -15*a(n-4) +30*a(n-5) +20*a(n-6) +7*a(n-7) -30*a(n-8) +a(n-9) +23*a(n-10) -8*a(n-11) -8*a(n-12) EXAMPLE Some solutions for n=4 ..3..3..1..3....0..0..0..0....0..3..1..3....0..0..3..1....3..1..3..1 ..0..2..2..2....3..1..3..1....3..3..2..0....0..0..0..2....0..0..0..2 CROSSREFS Sequence in context: A055218 A303843 A107307 * A005492 A003013 A117202 Adjacent sequences:  A240362 A240363 A240364 * A240366 A240367 A240368 KEYWORD nonn AUTHOR R. H. Hardin, Apr 04 2014 STATUS approved

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Last modified May 18 01:26 EDT 2021. Contains 343992 sequences. (Running on oeis4.)