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A154071 Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 8. +0
1
990, 3472, 5217, 7165, 5966, 5372, 3621, 1629, 738, 448, 184, 109, 100, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87 (list; graph; listen)
OFFSET

5,1

COMMENT

Value 87 starts at n=18 and continues through at least n=52.

EXAMPLE

Maximal zeros solution for n=18

...................0

..................1.1

.................0.3.0

................0.0.0.0

...............0.0.3.0.0

..............1.0.0.0.0.1

.............2.0.0.2.0.0.2

............0.1.0.1.1.0.1.0

...........0.2.0.0.1.0.0.2.0

..........0.0.1.0.1.1.0.1.0.0

.........0.0.2.0.0.1.0.0.2.0.0

........2.0.0.1.0.1.1.0.1.0.0.2

.......1.1.0.1.0.0.2.0.0.1.0.1.1

......0.0.0.1.2.0.0.0.0.2.1.0.0.0

.....0.2.1.0.0.0.0.3.0.0.0.0.1.2.0

....0.0.0.0.1.2.0.0.0.0.2.1.0.0.0.0

...1.0.2.1.0.0.0.0.3.0.0.0.0.1.2.0.1

..1.1.0.0.0.1.2.0.0.0.0.2.1.0.0.0.1.1

CROSSREFS

Sequence in context: A045733 A057668 A087702 this_sequence A112043 A068301 A119095

Adjacent sequences: A154068 A154069 A154070 this_sequence A154072 A154073 A154074

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 04 2009

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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