OFFSET
1,1
COMMENTS
Column 5 of A231997
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 20*a(n-1) +179*a(n-2) -2319*a(n-3) -6465*a(n-4) +94400*a(n-5) +4135*a(n-6) -1470735*a(n-7) +1313306*a(n-8) +11370092*a(n-9) -15268354*a(n-10) -49210967*a(n-11) +80813004*a(n-12) +124534656*a(n-13) -241975664*a(n-14) -181214096*a(n-15) +440235929*a(n-16) +133638297*a(n-17) -500004759*a(n-18) -15377732*a(n-19) +357539404*a(n-20) -51988544*a(n-21) -160824989*a(n-22) +43049434*a(n-23) +44820649*a(n-24) -16338828*a(n-25) -7424574*a(n-26) +3443248*a(n-27) +659756*a(n-28) -412295*a(n-29) -21425*a(n-30) +26930*a(n-31) -745*a(n-32) -861*a(n-33) +64*a(n-34) +10*a(n-35) -a(n-36)
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..0....0..0..1..0..0..0....0..0..0..0..0..0....1..0..0..0..0..1
..1..0..0..0..1..0....0..1..0..1..1..1....0..1..0..0..1..0....0..1..0..0..1..1
..1..0..0..1..0..0....0..0..0..0..0..0....0..0..0..0..0..0....1..0..0..0..0..0
..0..0..1..0..0..1....0..1..1..0..0..0....0..1..0..0..0..0....0..0..0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 16 2013
STATUS
approved