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A178296 Number of collinear point 5-tuples in a 6 X 6 X 6 X... n-dimensional cubic grid 0
0, 6, 88, 984, 9952, 96096, 907648, 8494464, 79355392, 743241216 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..9.

Index entries for linear recurrences with constant coefficients, signature (24, -188, 480) conjectured.

FORMULA

Conjecture: a(n) = 10^n/2+2*8^n-5*6^n/2. a(n)= 24*a(n-1) -188*a(n-2) +480*a(n-3). G.f.: 2*x*(-3+28*x)/((6*x-1)*(8*x-1)*(10*x-1)). [R. J. Mathar, May 24 2010]

CROSSREFS

Sequence in context: A210012 A226426 A210005 * A122770 A265267 A218260

Adjacent sequences:  A178293 A178294 A178295 * A178297 A178298 A178299

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 26 22:28 EDT 2017. Contains 284138 sequences.