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 A194570 Number of lower triangles of an n X n 0..2 array with new values introduced in row major order 0..2 and no element equal to more than two horizontal or vertical neighbors 0
 1, 5, 113, 7696, 1429748, 723276072, 996233663484, 3736289882783364, 38153100681294466800, 1060791108320009447746940, 80304497397124644777045379184, 16552355212984292716901267397576440 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 2 of A194576 LINKS Table of n, a(n) for n=1..12. EXAMPLE Some solutions for 3X3 ..0......0......0......0......0......0......0......0......0......0......0 ..1.1....1.2....1.0....0.1....1.2....0.0....0.1....1.1....1.2....1.1....1.0 ..1.0.2..2.2.0..0.0.2..2.1.0..1.1.2..1.0.0..1.0.1..0.0.1..0.1.0..2.0.2..2.2.0 CROSSREFS Sequence in context: A009603 A009678 A009691 * A210908 A355074 A053712 Adjacent sequences: A194567 A194568 A194569 * A194571 A194572 A194573 KEYWORD nonn AUTHOR R. H. Hardin Aug 29 2011 STATUS approved

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Last modified February 25 02:17 EST 2024. Contains 370308 sequences. (Running on oeis4.)