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 A238519 Number of (n+1) X (2+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors. 1
 588, 9612, 345744, 10332060, 321566028, 9918146448, 306521859084, 9468890997276, 292536258921504, 9037550907769116, 279205473387683676, 8625745262429841312, 266482953705659809356, 8232698585182917536556 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A238523. LINKS R. H. Hardin, Table of n, a(n) for n = 1..197 FORMULA Empirical: a(n) = 21*a(n-1) +297*a(n-2) +360*a(n-3) -2756*a(n-4) -2972*a(n-5) -3851*a(n-6) +31899*a(n-7) -15873*a(n-8) -11376*a(n-9) +11160*a(n-10) -5184*a(n-11) -3456*a(n-12). EXAMPLE Some solutions for n=2 ..3..2..0....2..3..0....3..0..1....3..1..2....1..0..1....0..3..0....3..1..0 ..1..3..1....3..0..3....2..1..0....1..2..1....2..3..0....2..0..1....2..0..2 ..3..1..2....2..3..1....1..0..1....2..1..3....1..0..3....1..2..3....1..2..1 CROSSREFS Cf. A238523. Sequence in context: A211852 A178973 A259248 * A185884 A115487 A210894 Adjacent sequences: A238516 A238517 A238518 * A238520 A238521 A238522 KEYWORD nonn AUTHOR R. H. Hardin, Feb 28 2014 STATUS approved

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Last modified June 24 22:33 EDT 2024. Contains 373690 sequences. (Running on oeis4.)