OFFSET
1,1
COMMENTS
Column 4 of A224353.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 15*a(n-1) -58*a(n-2) -13*a(n-3) +543*a(n-4) -1609*a(n-5) +1864*a(n-6) -17378*a(n-7) +62814*a(n-8) +73709*a(n-9) -307108*a(n-10) +721338*a(n-11) -862742*a(n-12) +4668915*a(n-13) -12478479*a(n-14) -3206649*a(n-15) +1858428*a(n-16) +5104796*a(n-17) +28929803*a(n-18) +21290844*a(n-19) +12857067*a(n-20) -28005842*a(n-21) -37205324*a(n-22) -26318800*a(n-23) -9161072*a(n-24) -1481856*a(n-25) -6336*a(n-26).
EXAMPLE
Some solutions for n=3
..0..0..1..1....1..1..1..1....0..0..2..2....0..1..1..2....0..0..1..1
..0..0..0..0....0..1..1..1....0..0..1..2....0..1..1..1....1..2..2..2
..0..0..1..2....1..1..1..1....0..0..0..0....1..1..1..1....0..1..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 04 2013
STATUS
approved