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 A239988 Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4 1
 4, 16, 56, 171, 530, 1495, 4059, 10121, 23476, 51169, 105957, 210063, 401043, 740392, 1325954, 2309449, 3920715, 6500605, 10544919, 16762214, 26148867, 40085363, 60458446, 89814510, 131550423, 190148874, 271466315, 383082641, 534722915 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A239986 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (1/907200)*n^10 - (1/72576)*n^9 + (113/120960)*n^8 - (265/12096)*n^7 + (2651/5400)*n^6 - (141761/17280)*n^5 + (40878671/362880)*n^4 - (10305217/9072)*n^3 + (399085217/50400)*n^2 - (86061371/2520)*n + 68243 for n>12 EXAMPLE Some solutions for n=4 ..3..0..0..0....3..0..0..0....3..0..0..0....3..0..0..0....3..0..0..0 ..2..1..0..0....2..3..0..3....2..1..0..0....2..1..0..0....2..3..0..3 ..2..0..0..3....2..0..0..0....2..0..0..0....2..0..3..0....2..0..1..0 ..3..2..0..2....2..0..0..0....3..2..0..0....3..0..0..1....3..2..0..3 CROSSREFS Sequence in context: A212520 A115108 A127393 * A308288 A340257 A261386 Adjacent sequences:  A239985 A239986 A239987 * A239989 A239990 A239991 KEYWORD nonn AUTHOR R. H. Hardin, Mar 30 2014 STATUS approved

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Last modified September 26 01:55 EDT 2021. Contains 347664 sequences. (Running on oeis4.)