OFFSET
1,1
COMMENTS
Column 4 of A223801
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 130*a(n-1) -4151*a(n-2) +55367*a(n-3) -1103289*a(n-4) +25676564*a(n-5) -311713584*a(n-6) +2153547070*a(n-7) -14084700670*a(n-8) +111538734736*a(n-9) -678666743150*a(n-10) +3151156493032*a(n-11) -15705615808280*a(n-12) +74227237529348*a(n-13) -265525650225285*a(n-14) +858145104057893*a(n-15) -2835818034237058*a(n-16) +7784228337705693*a(n-17) -17375928755819704*a(n-18) +37062908059029592*a(n-19) -69764230981154356*a(n-20) +99762651233668576*a(n-21) -119132184363098064*a(n-22) +127177566453563712*a(n-23) -90807087696380928*a(n-24) +28396177139635200*a(n-25) -1473691515457536*a(n-26) +18962192793600*a(n-27)
EXAMPLE
Some solutions for n=3
..0..0..1..1....0..0..2..3....0..0..2..1....0..0..2..1....0..0..0..2
..2..2..2..0....1..2..2..1....2..2..3..3....0..0..2..2....0..0..3..2
..0..1..2..1....0..1..3..1....0..1..2..2....0..3..0..0....3..2..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved