A270849 - OEIS

%I #3 Mar 24 2016 08:35:49

%S 0,198,24954,8559378,8746813158,29999932959600,358240737864481086,

%T 15211541078680656195678,2316320467474669254077347692

%N Number of nXnXn triangular 0..7 arrays with some element plus some adjacent element totalling 7+1, 7 or 7-1 exactly once.

%C Column 7 of A270850.

%e Some solutions for n=3

%e ....5......3......6......2......0......5......0......4......5......2......7

%e ...5.6....2.0....3.1....0.5....0.5....3.6....5.5....0.7....7.5....7.5....0.2

%e ..5.4.3..3.2.4..2.2.2..0.5.4..1.3.0..7.7.3..4.7.0..5.5.7..7.7.3..5.7.7..1.2.1

%Y Cf. A270850.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 24 2016