OFFSET
1,1
COMMENTS
Column 7 of A236997
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 140*a(n-1) -6176*a(n-2) +87040*a(n-3) +21476352*a(n-4) -3006689280*a(n-5) +132637949952*a(n-6) -1869301678080*a(n-7) -149335861886976*a(n-8) +20907020664176640*a(n-9) -922298283013963776*a(n-10) +12998193418642391040*a(n-11) +331760110214840320000*a(n-12) -46446415430077644800000*a(n-13) +2048950440686853816320000*a(n-14) -28876399993099701452800000*a(n-15)
EXAMPLE
Some solutions for n=1
..0..0..2..0..0..0..0..2....0..0..1..1..0..1..2..0....0..0..0..1..0..0..2..2
..1..2..2..1..1..2..0..1....0..2..0..0..0..1..1..1....0..2..1..2..2..2..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 02 2014
STATUS
approved