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A194132 Number of ways to arrange 4 indistinguishable points on an n X n X n triangular grid so that no three points are collinear at any angle. 2
0, 0, 6, 114, 843, 4122, 14988, 45414, 119340, 281442, 608616, 1228812, 2338779, 4240284, 7371414, 12354156, 20052846, 31653108, 48726846, 73358964, 108233781, 156793974, 223400004, 313529940, 433929258, 592922880, 800651538, 1069378740 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 4 of A194136.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..78

EXAMPLE

All solutions for 3 X 3 X 3:

....1......1......0......0......1......0

...0.1....1.1....1.1....1.1....1.0....1.1

..1.1.0..0.1.0..1.1.0..1.0.1..0.1.1..0.1.1

CROSSREFS

Sequence in context: A066931 A324669 A051228 * A194476 A059116 A121544

Adjacent sequences:  A194129 A194130 A194131 * A194133 A194134 A194135

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 17 2011

STATUS

approved

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Last modified September 17 22:53 EDT 2019. Contains 327147 sequences. (Running on oeis4.)