OFFSET
1,1
COMMENTS
Column 1 of A204530
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 42*a(n-1) -301*a(n-2) +7018*a(n-3) -246711*a(n-4) +1932028*a(n-5) +2956054*a(n-6) -27523156*a(n-7) -196432901*a(n-8) -585532890*a(n-9) +1746322505*a(n-10) +19859147886*a(n-11) +85680786975*a(n-12) +244983505210*a(n-13) +471589858737*a(n-14) +708315338882*a(n-15) +1028518018933*a(n-16) -308544484564*a(n-17) -5887364298507*a(n-18) -9565015392486*a(n-19) -2220382977630*a(n-20) +20089270038078*a(n-21) +33101395043625*a(n-22) -8587017266310*a(n-23) -56057358242907*a(n-24) -56089092902292*a(n-25) +84889500711327*a(n-26) +116281828075266*a(n-27) -127122688030410*a(n-28) -25838416895256*a(n-29) -43554241685556*a(n-30) +128735304733800*a(n-31) -18317461921848*a(n-32) -31118306226480*a(n-33) -17176063735008*a(n-34) +2036118835008*a(n-35) +24101915171328*a(n-36) -7475100774912*a(n-37) -1936872705024*a(n-38) -1823418003456*a(n-39) +749538717696*a(n-40) +857652240384*a(n-41) -325066162176*a(n-42)
EXAMPLE
Some solutions for n=3
..0..1..0....0..0..0....0..0..0....0..0..0....0..0..1....0..0..0....0..0..0
..2..0..1....1..0..1....1..2..0....0..0..0....1..0..0....1..2..3....0..0..1
..0..2..0....0..2..3....0..1..3....1..2..1....1..0..0....2..3..1....1..0..1
..1..2..2....1..1..1....0..2..1....0..1..3....2..1..0....1..1..1....1..2..0
..3..2..3....1..3..2....3..3..3....1..3..1....0..0..0....3..3..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2012
STATUS
approved