OFFSET
1,1
COMMENTS
Row 7 of A262420.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 170*a(n-1) +12088*a(n-2) -2054960*a(n-3) -43463646*a(n-4) +7388819820*a(n-5) +66398454660*a(n-6) -11287737292200*a(n-7) -47263888640505*a(n-8) +8034861068885850*a(n-9) +16948827007298316*a(n-10) -2881300591240713720*a(n-11) -3142452853334937648*a(n-12) +534216985066939400160*a(n-13) +298488023933669046336*a(n-14) -50742964068723737877120*a(n-15) -13934074238604397209600*a(n-16) +2368792620562747525632000*a(n-17) +287178122770920663040000*a(n-18) -48820280871056512716800000*a(n-19) -2061386929701535744000000*a(n-20) +350435778049261076480000000*a(n-21)
EXAMPLE
Some solutions for n=2
..1..1..0....0..0..0....1..1..0....1..1..0....0..1..1....0..1..1....0..1..1
..1..1..0....0..0..0....0..1..1....0..1..1....0..1..1....0..0..0....0..1..1
..0..1..1....0..1..1....1..1..0....0..1..1....0..0..0....0..0..0....1..1..0
..0..0..0....1..1..0....0..1..1....1..1..0....1..1..0....1..1..0....0..0..0
..0..0..0....0..1..1....1..1..0....0..1..1....0..1..1....0..0..0....0..1..1
..0..0..0....0..1..1....0..0..0....1..1..0....0..1..1....0..1..1....0..1..1
..1..1..0....0..1..1....1..1..0....0..0..0....0..0..0....0..0..0....1..1..0
..0..0..0....0..0..0....0..0..0....1..1..0....0..1..1....0..1..1....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 22 2015
STATUS
approved