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A154082 Number of planar triangular n X n X n nonnegative integer grids symmetric both under 120 degree rotation and reflection with every similarly oriented 5 X 5 X 5 subtriangle summing to 10. +0
1
0, 25, 47, 0, 15, 26, 0, 5, 12, 0, 1, 14, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0, 0, 10, 0 (list; graph; listen)
OFFSET

5,2

COMMENT

Pattern 0 0 10 starts at n=17 and continues through at least n=53.

EXAMPLE

Maximal zeros solution for n=19

....................2

...................0.0

..................0.2.0

.................2.0.0.2

................0.0.2.0.0

...............0.2.0.0.2.0

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

.............0.0.2.0.0.2.0.0

............0.2.0.0.2.0.0.2.0

...........2.0.0.2.0.0.2.0.0.2

..........0.0.2.0.0.2.0.0.2.0.0

.........0.2.0.0.2.0.0.2.0.0.2.0

........2.0.0.2.0.0.2.0.0.2.0.0.2

.......0.0.2.0.0.2.0.0.2.0.0.2.0.0

......0.2.0.0.2.0.0.2.0.0.2.0.0.2.0

.....2.0.0.2.0.0.2.0.0.2.0.0.2.0.0.2

....0.0.2.0.0.2.0.0.2.0.0.2.0.0.2.0.0

...0.2.0.0.2.0.0.2.0.0.2.0.0.2.0.0.2.0

..2.0.0.2.0.0.2.0.0.2.0.0.2.0.0.2.0.0.2

CROSSREFS

Sequence in context: A054520 A038811 A028505 this_sequence A143278 A106632 A090093

Adjacent sequences: A154079 A154080 A154081 this_sequence A154083 A154084 A154085

KEYWORD

nonn

AUTHOR

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

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Last modified November 24 19:42 EST 2009. Contains 167435 sequences.


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