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 A240625 Number of nX2 0..3 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..3 introduced in row major order 1
 2, 10, 109, 1332, 16624, 208015, 2604059, 32601488, 408158709, 5110007540, 63975568178, 800952543871, 10027655890879, 125542872147582, 1571754448134085, 19677835970041564, 246359874423207164 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A240629 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 14*a(n-1) -14*a(n-2) -60*a(n-3) +29*a(n-4) +150*a(n-5) -47*a(n-6) -124*a(n-7) -4*a(n-8) +84*a(n-9) -27*a(n-10) for n>11 EXAMPLE Some solutions for n=4 ..0..1....0..1....0..1....0..0....0..1....0..1....0..1....0..1....0..0....0..1 ..0..0....1..0....2..2....1..2....0..2....2..3....2..2....2..0....1..2....0..2 ..0..2....2..1....0..1....3..2....1..0....3..1....1..1....1..3....2..1....3..0 ..3..3....2..3....0..1....3..1....3..3....0..0....2..0....1..2....3..3....2..3 CROSSREFS Sequence in context: A003222 A262145 A003167 * A062412 A212491 A006608 Adjacent sequences:  A240622 A240623 A240624 * A240626 A240627 A240628 KEYWORD nonn AUTHOR R. H. Hardin, Apr 09 2014 STATUS approved

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Last modified December 8 12:07 EST 2019. Contains 329862 sequences. (Running on oeis4.)