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A178294 Number of collinear point triples in a 4 X 4 X 4 X... n-dimensional cubic grid. 1
0, 4, 44, 376, 2960, 22624, 171584, 1303936, 9969920, 76793344 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
Conjecture: a(n) = 8^n/2-3*4^n/2+6^n. a(n) = +18*a(n-1) -104*a(n-2) +192*a(n-3). G.f.: 4*x*(-1+7*x)/((6*x-1)*(8*x-1)*(4*x-1)). - R. J. Mathar, May 24 2010
CROSSREFS
Cf. A005059.
Sequence in context: A030987 A341590 A297384 * A043039 A198962 A002754
KEYWORD
nonn
AUTHOR
R. H. Hardin, suggested by R. J. Mathar in the Sequence Fans Mailing List, May 24 2010
STATUS
approved

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Last modified March 19 03:21 EDT 2024. Contains 370952 sequences. (Running on oeis4.)