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 A154067 Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 4 X 4 X 4 subtriangle summing to 8. 0
 182, 1408, 988, 2849, 1206, 2855, 879, 1266, 284, 262, 114, 119, 51, 61, 51, 61, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51 (list; graph; refs; listen; history; text; internal format)
 OFFSET 4,1 COMMENTS Value 51 starts at n=20 and continues through at least n=60. LINKS Table of n, a(n) for n=4..60. EXAMPLE Maximal zeros solution for n=20 .....................4 ....................0.0 ...................0.4.0 ..................0.0.0.0 .................0.0.4.0.0 ................4.0.0.0.0.4 ...............0.0.0.4.0.0.0 ..............0.4.0.0.0.0.4.0 .............0.0.0.0.4.0.0.0.0 ............0.0.4.0.0.0.0.4.0.0 ...........4.0.0.0.0.4.0.0.0.0.4 ..........0.0.0.4.0.0.0.0.4.0.0.0 .........0.4.0.0.0.0.4.0.0.0.0.4.0 ........0.0.0.0.4.0.0.0.0.4.0.0.0.0 .......0.0.4.0.0.0.0.4.0.0.0.0.4.0.0 ......4.0.0.0.0.4.0.0.0.0.4.0.0.0.0.4 .....0.0.0.4.0.0.0.0.4.0.0.0.0.4.0.0.0 ....0.4.0.0.0.0.4.0.0.0.0.4.0.0.0.0.4.0 ...0.0.0.0.4.0.0.0.0.4.0.0.0.0.4.0.0.0.0 ..0.0.4.0.0.0.0.4.0.0.0.0.4.0.0.0.0.4.0.0 CROSSREFS Sequence in context: A043463 A047636 A157205 * A234982 A234975 A186125 Adjacent sequences: A154064 A154065 A154066 * A154068 A154069 A154070 KEYWORD nonn AUTHOR R. H. Hardin Jan 04 2009 STATUS approved

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Last modified June 5 05:23 EDT 2023. Contains 363130 sequences. (Running on oeis4.)