A270262 - OEIS

%I #3 Mar 14 2016 09:33:22

%S 0,601368,168922341960,754152642763392,1217128601064427992,

%T 328713317385409802664,44017120053171675291312,

%U 2562731765801885593512960,96219147569870302189360080

%N Number of 7X7X7 triangular 0..n arrays with some element plus some adjacent element totalling n exactly once.

%C Row 7 of A270256.

%e Some solutions for n=2

%e ........0..............0..............0..............0..............0

%e .......0.1............1.0............0.0............0.0............0.1

%e ......0.0.0..........0.1.0..........0.0.0..........0.0.0..........1.0.0

%e .....0.1.0.0........0.0.0.1........0.1.1.0........0.0.0.0........0.0.1.0

%e ....1.0.0.1.0......1.0.0.0.0......0.0.0.0.0......0.0.0.0.1......0.0.1.0.1

%e ...0.0.0.0.0.0....0.0.0.1.0.1....0.0.0.0.0.1....0.0.0.0.1.0....0.1.0.0.0.0

%e ..0.0.1.1.0.1.0..1.0.1.0.0.0.0..1.0.1.0.0.0.0..0.0.1.0.0.0.0..1.0.0.0.1.0.0

%Y Cf. A270256.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 14 2016