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 A232511 Number of (n+1)X(4+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally, with no adjacent elements equal 1
 54, 326, 2516, 19138, 145682, 1110752, 8470018, 64594290, 492627324, 3757052022, 28653492802, 218528696816, 1666631440922, 12710736921242, 96939753662116, 739321100203858, 5638509196177426, 43002676390969828, 327964380966543498 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A232515 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 8*a(n-1) +a(n-2) -23*a(n-3) -48*a(n-4) -9*a(n-5) +40*a(n-6) +44*a(n-7) +5*a(n-8) -20*a(n-9) +3*a(n-10) +9*a(n-11) +6*a(n-12) -a(n-13) -2*a(n-14) EXAMPLE Some solutions for n=5 ..2..1..0..1..0....2..1..0..1..2....0..1..2..1..0....0..1..0..1..0 ..0..1..2..1..0....0..1..0..1..0....2..1..2..1..2....0..1..2..1..0 ..2..1..2..1..0....0..1..0..1..2....0..1..2..1..0....0..1..2..1..2 ..2..1..0..1..0....0..1..2..1..0....0..1..2..1..0....2..1..2..1..2 ..2..1..0..1..0....2..1..0..1..2....2..1..2..1..0....0..1..0..1..0 ..0..1..0..1..2....0..1..0..1..2....0..1..0..1..0....0..1..2..1..0 CROSSREFS Sequence in context: A245830 A102838 A090832 * A262853 A230921 A239687 Adjacent sequences:  A232508 A232509 A232510 * A232512 A232513 A232514 KEYWORD nonn AUTHOR R. H. Hardin, Nov 25 2013 STATUS approved

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Last modified December 8 05:26 EST 2021. Contains 349590 sequences. (Running on oeis4.)