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 A208861 Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors 1
 51, 23047, 12883280, 7240366702, 4071491223248, 2289701830963879, 1287681340443915644, 724166398812363542260, 407256849342915985761092, 229033195050822330468202369, 128803738036903910358389563556 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A208864 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 831*a(n-1) -179993*a(n-2) +17822337*a(n-3) -914949819*a(n-4) +23168761555*a(n-5) -161356715633*a(n-6) -4487021565447*a(n-7) +88170625092243*a(n-8) -89146256087223*a(n-9) -9123849468343275*a(n-10) +57411954474413179*a(n-11) +280936943350232287*a(n-12) -3595338835588287543*a(n-13) +1929659835323795485*a(n-14) +90093226296032329771*a(n-15) -288134852946702870262*a(n-16) -742914836218346528932*a(n-17) +7115855576376274368216*a(n-18) -24955774603971431557536*a(n-19) +63937383750208880620992*a(n-20) -111375370598187857506560*a(n-21) +72057203548966403859456*a(n-22) +76274285418217337610240*a(n-23) -111975434876548575756288*a(n-24) +5300659781619687751680*a(n-25) +29374280040899283517440*a(n-26) -7836898836947747733504*a(n-27) for n>28 EXAMPLE Some solutions for n=4 ..0..0..0..0..1....0..0..0..0..0....0..1..0..0..0....0..1..1..0..0 ..1..1..1..2..1....0..1..1..2..2....1..0..1..1..1....0..1..2..0..1 ..2..3..0..1..2....2..2..3..2..3....1..0..2..3..2....3..2..3..1..2 ..0..0..1..3..0....3..1..1..2..1....3..2..3..1..1....2..0..1..0..0 CROSSREFS Sequence in context: A241332 A202886 A223059 * A208869 A208876 A208172 Adjacent sequences:  A208858 A208859 A208860 * A208862 A208863 A208864 KEYWORD nonn AUTHOR R. H. Hardin Mar 02 2012 STATUS approved

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Last modified December 3 00:59 EST 2021. Contains 349445 sequences. (Running on oeis4.)