OFFSET
1,1
COMMENTS
Column 6 of A223423
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 48*a(n-1) -460*a(n-2) -4144*a(n-3) +60160*a(n-4) -27456*a(n-5) -1549312*a(n-6) +3687168*a(n-7) +10996224*a(n-8) -43337728*a(n-9) -1603584*a(n-10) +149012480*a(n-11) -140541952*a(n-12) -92667904*a(n-13) +182190080*a(n-14) -52166656*a(n-15) -28835840*a(n-16) +16777216*a(n-17) -2097152*a(n-18)
EXAMPLE
Some solutions for n=3
..0..2..6..2..0..2....0..2..6..2..0..2....1..0..2..6..2..0....0..2..6..2..6..2
..2..5..2..6..2..6....2..6..2..0..1..0....0..1..0..2..5..2....2..6..2..0..2..6
..0..2..5..2..6..2....5..2..0..2..0..2....2..0..2..0..2..0....5..2..0..2..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 20 2013
STATUS
approved