login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Number of nXnXn triangular 0..6 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and every horizontal row having the same average value
0

%I #3 Jul 20 2012 11:43:17

%S 7,25,263,7801,562559,98726075,39956910039

%N Number of nXnXn triangular 0..6 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and every horizontal row having the same average value

%C Column 6 of A214540

%e Some solutions for n=4

%e .....2........3........2........3........3........2........4........3

%e ....2.2......4.2......3.1......4.2......4.2......1.3......2.6......6.0

%e ...4.2.0....3.4.2....2.3.1....4.3.2....5.2.2....1.5.0....6.0.6....3.6.0

%e ..6.2.0.0..0.4.2.6..4.0.4.0..4.3.2.3..1.5.1.5..0.3.5.0..6.0.4.6..3.3.6.0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jul 20 2012