OFFSET
1,1
COMMENTS
Column 2 of A257017
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 57*a(n-1) -1368*a(n-2) +53928*a(n-3) -266760*a(n-4) -7303608*a(n-5) +214125120*a(n-6) -8896319424*a(n-7) +57672414720*a(n-8) +432546283008*a(n-9) -7633921904640*a(n-10) +215054243426304*a(n-11) -1510880432947200*a(n-12) -2386109465100288*a(n-13) +52716443900313600*a(n-14) -1103770884016963584*a(n-15) +8001130220255969280*a(n-16) -9600072345842614272*a(n-17) -23147623339744296960*a(n-18) +857994776901995986944*a(n-19) -6381793763148001443840*a(n-20) +6441531921466530988032*a(n-21) +18379960457618553569280*a(n-22) -154486328584550108626944*a(n-23) +996588276555235014475776*a(n-24) -654295038711035754184704*a(n-25) -5234360309688286033477632*a(n-26) +6979147079584381377970176*a(n-27)
EXAMPLE
Some solutions for n=1
..0..2..2..0....0..1..1..0....0..0..1..2....0..1..2..2....0..1..1..1
..1..0..1..0....1..1..2..0....2..0..2..1....1..1..0..2....2..0..0..0
..1..1..1..2....0..2..2..2....0..0..0..1....2..2..2..0....2..2..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 14 2015
STATUS
approved