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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
1
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; listen)
OFFSET

3,1

COMMENT

Pattern 621 621 900 starts at n=11 and continues through at least n=57.

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: A063334 A102805 A135192 this_sequence A165023 A107658 A004008

Adjacent sequences: A154036 A154037 A154038 this_sequence A154040 A154041 A154042

KEYWORD

nonn

AUTHOR

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

page 1

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.


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