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 A195272 Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by 2 or less and triangles differing by a constant counted only once 1
 1, 25, 2125, 626525, 649112125, 2375645170875, 30812488814662125, 1419187229961716246975, 232443697109891957009442125, 135513533218801266004475511024825 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 2 of A195278 LINKS R. H. Hardin, Table of n, a(n) for n = 1..11 EXAMPLE Some solutions for n=5 ...0...............0...............0...............0...............0 ..-2.-1...........-1..0...........-1..1...........-2..0............2..1 ...0..1..3........-3.-2..0........-3.-1..1........-1..0.-1.........0.-1..1 ...2..1..2..0.....-1.-3.-1.-2.....-3.-3.-1..0.....-2..0.-1..0.....-2.-1..1..2 ...4..3..4..2..3...0.-1.-3.-4.-3..-5.-4.-3.-1..0..-1.-1.-2..0..0..-4.-2.-1..0..1 CROSSREFS Sequence in context: A279276 A197408 A197430 * A266130 A363192 A222276 Adjacent sequences: A195269 A195270 A195271 * A195273 A195274 A195275 KEYWORD nonn AUTHOR R. H. Hardin Sep 14 2011 STATUS approved

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Last modified June 18 15:05 EDT 2024. Contains 373481 sequences. (Running on oeis4.)