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 A267904 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to at least one horizontal or vertical neighbor and the top left element equal to 0. 0
 0, 30, 138, 17658, 414138, 28493946, 1246334388, 72638390592, 3823498828854, 218021286182580 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 4 of A267901. LINKS Table of n, a(n) for n=1..10. EXAMPLE Some solutions for n=4 ..0..2..2..2....0..0..3..2....0..0..3..3....0..0..3..3....0..0..0..0 ..0..0..3..2....0..0..3..2....0..0..2..3....2..2..1..2....3..3..1..1 ..1..0..3..1....1..1..1..2....1..1..2..3....3..3..1..2....3..2..1..1 ..1..3..3..1....3..3..1..2....2..2..1..1....0..0..1..1....3..2..2..2 CROSSREFS Cf. A267901. Sequence in context: A348828 A158462 A064495 * A218407 A347222 A229450 Adjacent sequences: A267901 A267902 A267903 * A267905 A267906 A267907 KEYWORD nonn AUTHOR R. H. Hardin, Jan 22 2016 STATUS approved

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Last modified September 7 16:40 EDT 2024. Contains 375749 sequences. (Running on oeis4.)