OFFSET
1,1
COMMENTS
Column 4 of A209503
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 118*a(n-1) +1604*a(n-2) -127784*a(n-3) -79452*a(n-4) +37606360*a(n-5) -178547756*a(n-6) -2931053296*a(n-7) +18312307424*a(n-8) +74021561744*a(n-9) -495233537616*a(n-10) -1023076292096*a(n-11) +5490220477440*a(n-12) +8804921243328*a(n-13) -24309394624512*a(n-14) -36012394278144*a(n-15) +28360887229440*a(n-16) +27667991881728*a(n-17) -15907925311488*a(n-18) for n>19
EXAMPLE
Some.solutions.for.n=4
..0..1..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..2..1..2....1..2..3..2....1..2..3..4....1..2..1..3....1..2..3..1
..0..0..0..2....0..0..3..4....1..3..4..0....3..2..0..1....4..4..4..1
..1..2..1..2....4..3..4..0....2..2..4..3....0..0..3..3....0..2..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 09 2012
STATUS
approved