

A222157


Number of nX5 arrays with each row a permutation of 1..5 having at least as many downsteps as the preceding row, with rows in lexicographically nondecreasing order


1



120, 6322, 207262, 4907711, 91075868, 1393742886, 18203084280, 207961261268, 2116883443548, 19475385665260, 163788555854232, 1270883781907016, 9168186853827174, 61890082396969113, 393107547309424404
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OFFSET

1,1


COMMENTS



LINKS



FORMULA

See link for formula


EXAMPLE

Some solutions for n=3
..2..3..5..1..4....1..2..5..3..4....1..5..2..3..4....3..4..2..1..5
..5..1..2..4..3....3..5..1..4..2....3..5..2..1..4....5..3..2..1..4
..5..1..3..4..2....5..2..3..4..1....4..3..2..5..1....5..4..2..1..3


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



