%I
%S 0,5,64,629,5632,48485,410944,3470549,29389312,250334405
%N Number of collinear point 4tuples in a 5 X 5 X 5 X... ndimensional cubic grid
%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (21, 143, 315) conjectured.
%F Conjecture: a(n) = 9^n/2+3*7^n/22*5^n. a(n)= +21*a(n1) 143*a(n2) +315*a(n3). G.f.: x*(5+41*x)/((9*x1)*(7*x1)*(5*x1)). [_R. J. Mathar_, May 24 2010]
%K nonn
%O 0,2
%A _R. H. Hardin_, suggested by R. J. Mathar in the Sequence Fans Mailing List, May 24 2010
