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A224003
Number of 5Xn 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing
1
243, 4004, 18672, 55333, 132119, 281271, 559188, 1063365, 1958634, 3517866, 6183395, 10657414, 18032067, 29972868, 48972482, 78695853, 124442202, 193754586, 297213549, 449457950, 670483363, 987276552, 1435853472, 2063778077
OFFSET
1,1
COMMENTS
Row 5 of A223999
LINKS
FORMULA
Empirical: a(n) = (1/86400)*n^10 + (1/5760)*n^9 + (13/3360)*n^8 + (1079/20160)*n^7 + (19031/28800)*n^6 + (35137/5760)*n^5 + (513623/8640)*n^4 + (161053/480)*n^3 + (3838487/2800)*n^2 - (614813/210)*n - 2235 for n>6
EXAMPLE
Some solutions for n=3
..0..2..2....0..0..0....0..0..2....1..1..1....0..2..2....0..0..0....0..0..0
..0..1..2....0..0..1....0..0..0....1..1..1....0..0..2....0..0..2....1..1..2
..0..1..2....0..0..2....0..0..0....1..1..2....0..1..2....1..1..2....0..1..2
..0..1..1....0..2..2....0..1..2....0..2..2....0..0..1....0..1..2....0..0..1
..1..1..2....0..2..2....1..1..1....2..2..2....0..2..2....0..1..1....0..2..2
CROSSREFS
Sequence in context: A016757 A133550 A029700 * A232027 A183808 A231913
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2013
STATUS
approved