OFFSET
1,1
COMMENTS
Column 1 of A253615
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) +45*a(n-2) -184*a(n-3) -458*a(n-4) +1161*a(n-5) +1148*a(n-6) -1369*a(n-7) +3794*a(n-8) -2764*a(n-9) -55923*a(n-10) +7449*a(n-11) +208853*a(n-12) -98842*a(n-13) -23515*a(n-14) -853218*a(n-15) +1405774*a(n-16) -204020*a(n-17) -793726*a(n-18) +2392307*a(n-19) -3658864*a(n-20) +612572*a(n-21) +461558*a(n-22) -1884359*a(n-23) +3941388*a(n-24) +1134857*a(n-25) -2874383*a(n-26) +204350*a(n-27) +666534*a(n-28) -42988*a(n-29) -191134*a(n-30) -89650*a(n-31) +7276*a(n-32) -21568*a(n-33) +8124*a(n-34) -12728*a(n-35) -4896*a(n-36) -320*a(n-37) -512*a(n-38)
EXAMPLE
Some solutions for n=3
..0..1..0....0..1..1....0..0..0....0..1..1....0..1..0....0..0..1....0..1..0
..2..0..0....2..0..0....1..0..0....1..0..0....2..2..0....0..0..2....1..2..1
..2..2..2....1..2..1....1..1..2....2..1..1....1..2..2....2..2..2....1..1..0
..0..0..1....0..0..2....0..2..0....0..2..0....1..1..1....0..1..0....0..1..1
..2..1..2....0..1..1....1..0..1....0..0..2....0..1..0....1..2..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2015
STATUS
approved