OFFSET
1,1
COMMENTS
Column 2 of A237809
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 13*a(n-1) +32*a(n-2) -995*a(n-3) +1203*a(n-4) +30639*a(n-5) -80894*a(n-6) -484821*a(n-7) +1819880*a(n-8) +4094432*a(n-9) -21975137*a(n-10) -15423994*a(n-11) +159646072*a(n-12) -20537582*a(n-13) -731838006*a(n-14) +482636414*a(n-15) +2157585399*a(n-16) -2313673429*a(n-17) -4063269643*a(n-18) +6080908617*a(n-19) +4636945145*a(n-20) -9951312215*a(n-21) -2581453624*a(n-22) +10458352359*a(n-23) -391104242*a(n-24) -7005351042*a(n-25) +1614638448*a(n-26) +2873473052*a(n-27) -1062608408*a(n-28) -658678792*a(n-29) +325725984*a(n-30) +66680608*a(n-31) -46683520*a(n-32) -308864*a(n-33) +2464512*a(n-34) -202240*a(n-35) -15360*a(n-36)
EXAMPLE
Some solutions for n=4
..1..2..1....1..2..1....0..0..2....1..1..0....2..2..2....0..2..0....0..2..2
..1..2..2....0..1..0....2..2..0....2..1..1....0..2..0....1..1..0....0..2..0
..1..2..1....1..2..0....2..0..2....1..1..0....0..2..1....2..2..1....0..2..1
..1..0..1....0..1..0....2..2..2....1..0..1....0..2..0....1..2..1....2..2..0
..2..0..2....2..1..2....2..0..2....1..1..0....2..2..0....0..1..0....0..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 13 2014
STATUS
approved