OFFSET
1,1
COMMENTS
Column 5 of A208864
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 831*a(n-1) -179993*a(n-2) +17822337*a(n-3) -914949819*a(n-4) +23168761555*a(n-5) -161356715633*a(n-6) -4487021565447*a(n-7) +88170625092243*a(n-8) -89146256087223*a(n-9) -9123849468343275*a(n-10) +57411954474413179*a(n-11) +280936943350232287*a(n-12) -3595338835588287543*a(n-13) +1929659835323795485*a(n-14) +90093226296032329771*a(n-15) -288134852946702870262*a(n-16) -742914836218346528932*a(n-17) +7115855576376274368216*a(n-18) -24955774603971431557536*a(n-19) +63937383750208880620992*a(n-20) -111375370598187857506560*a(n-21) +72057203548966403859456*a(n-22) +76274285418217337610240*a(n-23) -111975434876548575756288*a(n-24) +5300659781619687751680*a(n-25) +29374280040899283517440*a(n-26) -7836898836947747733504*a(n-27) for n>28
EXAMPLE
Some solutions for n=4
..0..0..0..0..1....0..0..0..0..0....0..1..0..0..0....0..1..1..0..0
..1..1..1..2..1....0..1..1..2..2....1..0..1..1..1....0..1..2..0..1
..2..3..0..1..2....2..2..3..2..3....1..0..2..3..2....3..2..3..1..2
..0..0..1..3..0....3..1..1..2..1....3..2..3..1..1....2..0..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 02 2012
STATUS
approved