login
A223683
Number of 5Xn 0..1 arrays with rows and antidiagonals unimodal
1
32, 1024, 13045, 85663, 384009, 1363639, 4123210, 11062778, 27036251, 61267043, 130398069, 263173867, 507406703, 940062881, 1681523014, 2915323586, 4914979621, 8079822545, 12982166253, 20428540847, 31538210365, 47842720947
OFFSET
1,1
COMMENTS
Row 5 of A223680
LINKS
FORMULA
Empirical: a(n) = (359/453600)*n^10 + (251/30240)*n^9 + (14533/60480)*n^8 + (583/630)*n^7 + (62303/5400)*n^6 - (4999/1440)*n^5 + (14868751/181440)*n^4 - (1038043/3780)*n^3 + (3156491/8400)*n^2 - (91003/210)*n + 362 for n>2
EXAMPLE
Some solutions for n=3
..0..0..0....0..1..0....1..1..1....0..1..1....1..0..0....1..1..1....1..0..0
..0..0..0....0..0..0....1..1..1....0..1..0....1..1..0....0..0..0....0..0..0
..0..1..0....0..0..0....0..1..0....0..1..1....0..1..0....0..0..0....0..1..0
..0..1..0....0..0..1....0..0..0....1..1..0....0..0..0....0..0..1....0..0..1
..0..1..1....1..1..0....0..1..0....0..0..1....0..1..1....0..0..0....0..1..1
CROSSREFS
Sequence in context: A189692 A188743 A188995 * A189067 A189192 A188877
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 25 2013
STATUS
approved