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 A154039 Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 3 X 3 X 3 subtriangle summing to 4. 0
 126, 503, 1046, 1389, 1898, 1290, 897, 912, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900, 621, 621, 900 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,1 COMMENTS Pattern 621 621 900 starts at n=11 and continues through at least n=57. LINKS EXAMPLE Maximal zeros solution for n=11 ............0 ...........0.0 ..........0.2.2 .........2.0.0.0 ........0.0.2.0.0 .......0.2.0.0.2.2 ......2.0.0.2.0.0.0 .....0.0.2.0.0.2.0.0 ....0.2.0.0.2.0.0.2.2 ...2.0.0.2.0.0.2.0.0.0 ..0.0.2.0.0.2.0.0.2.0.0 CROSSREFS Sequence in context: A222341 A241270 A135192 * A202601 A202594 A245992 Adjacent sequences:  A154036 A154037 A154038 * A154040 A154041 A154042 KEYWORD nonn AUTHOR R. H. Hardin Jan 04 2009 STATUS approved

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Last modified January 17 20:06 EST 2022. Contains 350410 sequences. (Running on oeis4.)