Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.
1,1
Column 4 of A194505
Table of n, a(n) for n=1..7.
Some solutions for 3X3
..0......1......3......1......0......1......2......2......4......1......0
..2.0....0.3....2.4....0.2....1.0....4.0....4.2....0.4....2.3....2.2....3.4
..4.1.4..2.4.0..1.1.4..1.4.2..0.3.1..0.0.2..3.1.2..2.0.1..3.4.0..3.3.4..3.2.4
Sequence in context: A053763 A193611 A193755 * A053923 A211214 A229867
Adjacent sequences: A194498 A194499 A194500 * A194502 A194503 A194504
nonn
R. H. Hardin Aug 27 2011
approved