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Number of collinear point 4-tuples in an n X n .. X n 4-dimensional cubical grid
1

%I #4 Mar 31 2012 12:35:44

%S 0,0,0,520,5632,31176,135240,429360,1211208,3028224,6888216,13961448,

%T 28262776,52206088,91745904,157574640,263360352,418048464,657072528,

%U 991543416,1487807520,2194825240,3156000184,4416200736,6212710248

%N Number of collinear point 4-tuples in an n X n .. X n 4-dimensional cubical grid

%H R. H. Hardin, <a href="/A178269/b178269.txt">Table of n, a(n) for n=1..33</a>

%Y Three collinear points in an n X n grid A000938 ; n X n X n grid A157882

%K nonn

%O 1,4

%A _R. H. Hardin_, suggested by R. J. Mathar in the Sequence Fans Mailing List, May 24 2010