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 A154048 Number of planar triangular n X n X n nonnegative integer grids symmetric both under 120 degree rotation and reflection with every similarly oriented 4 X 4 X 4 subtriangle summing to 5. 0
 2, 6, 3, 5, 1, 6, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 4,1 COMMENTS Pattern 1 4 1 2 starts at n=10 and continues through at least n=60. LINKS Table of n, a(n) for n=4..60. EXAMPLE Maximal zeros solution for n=10 ...........1 ..........1.1 .........0.0.0 ........0.1.1.0 .......1.0.1.0.1 ......1.1.0.0.1.1 .....0.0.0.2.0.0.0 ....0.1.1.0.0.1.1.0 ...1.0.1.0.1.0.1.0.1 ..1.1.0.0.1.1.0.0.1.1 CROSSREFS Sequence in context: A282061 A258252 A351496 * A259018 A353649 A084355 Adjacent sequences: A154045 A154046 A154047 * A154049 A154050 A154051 KEYWORD nonn AUTHOR R. H. Hardin Jan 04 2009 STATUS approved

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Last modified July 13 02:50 EDT 2024. Contains 374265 sequences. (Running on oeis4.)