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 A178298 Number of collinear point triples in a 5 X 5 X 5 X... n-dimensional cubic grid. 1
 0, 10, 152, 1858, 21680, 253690, 3023432, 36785458, 455700320, 5725140970 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Index entries for linear recurrences with constant coefficients, signature (34, -416, 2174, -4095) conjectured. FORMULA From R. J. Mathar May 24 2010: (Start) Conjecture: a(n) = 7^n - 5^(n+1)/2 + 13^n/2 + 9^n. Conjecture: a(n) = 34*a(n-1) - 416*a(n-2) + 2174*a(n-3) - 4095*a(n-4). Conjectured g.f.: 2*x*(5-94*x+425*x^2)/((9*x-1)*(13*x-1)*(7*x-1)*(5*x-1)). (End) CROSSREFS Sequence in context: A034325 A239620 A253124 * A251730 A222487 A269608 Adjacent sequences:  A178295 A178296 A178297 * A178299 A178300 A178301 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 December 10 20:55 EST 2018. Contains 318049 sequences. (Running on oeis4.)