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 A233984 Number of (n+1)X(3+1) 0..4 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 10, and no two adjacent values equal 1
 976, 9632, 92320, 914000, 8950496, 88388464, 869143232, 8570819600, 84375689440, 831554681360, 8189556095648, 80691702085856, 794817221203456, 7830541789521408, 77136359926894368, 759914432268558384 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A233989 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 152*a(n-2) +150*a(n-3) -8071*a(n-4) -8102*a(n-5) +220582*a(n-6) +154134*a(n-7) -3549162*a(n-8) -957558*a(n-9) +35319910*a(n-10) -6392950*a(n-11) -218035822*a(n-12) +131758738*a(n-13) +804014815*a(n-14) -803217908*a(n-15) -1602211348*a(n-16) +2304441408*a(n-17) +1290558096*a(n-18) -3076728768*a(n-19) +201005888*a(n-20) +1628959232*a(n-21) -560044032*a(n-22) -245846016*a(n-23) +128188416*a(n-24) -7864320*a(n-25) EXAMPLE Some solutions for n=3 ..0..1..3..2....1..2..1..2....4..3..1..3....0..2..3..4....4..2..4..2 ..2..3..2..0....2..4..3..1....2..1..2..4....1..0..1..3....2..1..2..1 ..3..1..3..1....1..2..1..0....4..2..4..3....3..2..3..2....1..3..4..3 ..2..0..2..0....3..4..3..2....3..4..3..1....1..0..1..3....0..1..3..1 CROSSREFS Sequence in context: A254072 A253363 A253907 * A205252 A190400 A288917 Adjacent sequences: A233981 A233982 A233983 * A233985 A233986 A233987 KEYWORD nonn AUTHOR R. H. Hardin, Dec 18 2013 STATUS approved

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Last modified August 4 01:40 EDT 2024. Contains 374905 sequences. (Running on oeis4.)