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A194014 Number of ways to arrange 9 points on an n X n X n triangular grid so that it balances at its center. 1
0, 0, 0, 1, 136, 4130, 62514, 604546, 4291625, 24185859, 113919241, 464544503, 1682475175, 5516378285, 16616546191, 46520940879, 122188233722, 303383298778, 716597693883, 1618737603962, 3512685981565, 7350652764391, 14882247432591 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Column 9 of A194016.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..35

EXAMPLE

Some solutions for 7 X 7 X 7:

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

.......0.1............1.0............0.1............1.0............0.0

......0.1.0..........0.0.0..........1.1.0..........0.0.0..........1.0.0

.....0.1.0.1........0.0.1.0........0.0.0.0........0.0.0.0........0.0.0.1

....1.0.0.0.0......0.0.0.1.0......1.0.0.0.0......0.1.1.0.0......0.0.0.0.1

...0.0.0.0.0.1....1.0.0.0.0.1....0.1.0.1.1.0....0.1.0.0.1.1....1.1.0.0.0.1

..0.1.1.0.1.0.0..0.1.0.1.1.0.0..0.0.0.1.0.1.0..1.0.0.0.0.1.0..0.0.1.1.0.0.0

CROSSREFS

Sequence in context: A071231 A233102 A249237 * A248452 A035819 A233086

Adjacent sequences:  A194011 A194012 A194013 * A194015 A194016 A194017

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 11 2011

STATUS

approved

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Last modified September 22 17:16 EDT 2020. Contains 337291 sequences. (Running on oeis4.)