OFFSET
1,2
COMMENTS
(Empirical) Number of nX5 matrices containing a defective permutation of 1..5*n in strictly increasing order rowwise and columnwise, with one permutation value omitted and one repeated (see example)
Column 5 of A181204
LINKS
R. H. Hardin, Table of n, a(n) for n=1..50
EXAMPLE
Some solutions for 2X5
..1..4..5..6..8....1..2..4..7..9....1..3..5..8..9....1..2..5..6..8
..3..5..7..9.10....5..6..8..9.10....4..6..7..9.10....3..4..8..9.10
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2010
STATUS
approved