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1,4
Row 5 of A187155
R. H. Hardin, Table of n, a(n) for n = 1..50
Empirical: a(n) = 100*n^2 - 584*n + 808 for n>3
Some solutions for 4X4
..0..0..1..0....0..4..0..0....0..0..0..0....0..5..0..1....0..2..0..0
..0..2..0..0....3..0..5..0....0..3..0..5....4..0..2..0....3..0..1..0
..5..0..3..0....0..2..0..0....2..0..4..0....0..3..0..0....0..4..0..0
..0..4..0..0....0..0..1..0....0..1..0..0....0..0..0..0....0..0..5..0
Sequence in context: A192792 A084479 A084478 * A164377 A156632 A204484
Adjacent sequences: A187155 A187156 A187157 * A187159 A187160 A187161
nonn
R. H. Hardin Mar 06 2011
approved