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 A194536 Number of lower triangles of an n X n 0..4 array with new values introduced in row major order 0..4 and no element equal to more than one horizontal or vertical neighbor 0
 1, 4, 131, 43785, 79201795, 627974590650, 21399815343394998, 3132305932642809585983, 1969210116072259125767299138 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 4 of A194540 LINKS EXAMPLE Some solutions for 3X3 ..0......0......0......0......0......0......0......0......0......0......0 ..1.2....1.0....1.2....1.1....1.0....1.2....1.0....0.1....1.2....1.2....0.1 ..2.0.1..2.2.1..0.1.0..0.2.1..2.3.4..3.2.0..0.2.3..1.0.0..2.1.2..0.3.1..1.0.1 CROSSREFS Sequence in context: A113253 A201977 A291172 * A064227 A353794 A204079 Adjacent sequences: A194533 A194534 A194535 * A194537 A194538 A194539 KEYWORD nonn AUTHOR R. H. Hardin Aug 28 2011 STATUS approved

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Last modified December 5 07:25 EST 2022. Contains 358582 sequences. (Running on oeis4.)