|
%I #6 Dec 18 2015 18:17:45
%S 8,50,610,14536,681942,63338492,11683832092,4290676097374,
%T 3142339851746238,4595720660886942892,13436641716584454488144,
%U 78603060373509486868646762,920680713893261032002755485080
%N Number of lower triangles of an n X n 0..7 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less
%C Column 7 of A195232
%H R. H. Hardin, <a href="/A195231/b195231.txt">Table of n, a(n) for n = 1..15</a>
%e Some solutions for n=4
%e ..1........5........0........1........1........6........7........5
%e ..0.1......6.5......1.0......2.2......2.1......5.6......7.6......5.4
%e ..1.1.2....6.6.5....0.1.1....2.2.2....1.2.2....6.6.5....6.7.6....5.4.4
%e ..0.1.1.2..6.6.6.6..1.0.1.2..2.1.2.2..1.1.1.2..6.6.6.6..6.6.6.7..5.4.4.3
%K nonn
%O 1,1
%A _R. H. Hardin_ Sep 13 2011
| 