A211902 - OEIS

A211902

Number of triangular nXnXn arrays colored with integers 0 upwards introduced in row major order, with no element equal to any neighbor, and containing the value n(n+1)/2-5

%I #3 Apr 25 2012 06:56:00

%S 0,0,15,2605,336017,12353030,212518051,2254248571,17095114982

%N Number of triangular nXnXn arrays colored with integers 0 upwards introduced in row major order, with no element equal to any neighbor, and containing the value n(n+1)/2-5

%C Column 4 of A211904

%e Some solutions for n=4

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

%e ....1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2

%e ...3.0.3....0.3.4....3.4.3....3.4.0....3.4.0....3.4.3....3.4.0....3.4.3

%e ..4.2.5.0..3.1.5.6..5.0.2.5..5.0.5.2..2.0.2.5..2.5.2.5..0.5.3.4..0.2.5.2

%K nonn

%O 1,3

%A _R. H. Hardin_ Apr 25 2012