A178281 - OEIS

%I #6 Jul 22 2025 08:13:41

%S 0,0,7448,171584,3023432,21306432,154462184,685844864,2920347912,

%T 9889081088,32177621552,86293676352,234878672352,554074612032,

%U 1280999302448,2735778096000,5764546457280,11186777912960,21769309667880

%N Number of collinear point triples in an n X n .. X n 6-dimensional cubical grid.

%H R. H. Hardin, <a href="/A178281/b178281.txt">Table of n, a(n) for n=1..31</a>

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

%K nonn

%O 1,3

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