OFFSET
1,1
COMMENTS
Column 1 of A237951
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 1560*a(n-4) +11688*a(n-6) -610232*a(n-8) -5928792*a(n-10) +83894672*a(n-12) +940586352*a(n-14) -3589253408*a(n-16) -53418037952*a(n-18) +34878344128*a(n-20) +1320056629504*a(n-22) +920196238464*a(n-24) -14002856470016*a(n-26) -18920656812032*a(n-28) +49172761794560*a(n-30) +77939535077376*a(n-32) -51754973675520*a(n-34) -94552987795456*a(n-36) -9959401586688*a(n-38) +16399438184448*a(n-40) +2392665882624*a(n-42) -847987605504*a(n-44) -86973087744*a(n-46)
EXAMPLE
Some solutions for n=4
..0..1....3..3....2..2....0..2....2..2....1..2....2..3....2..1....0..3....3..0
..1..2....2..2....2..2....0..2....3..1....1..3....1..2....2..1....2..2....1..3
..2..0....3..2....3..2....3..0....2..0....3..0....0..3....3..1....2..2....1..2
..2..0....3..1....2..3....0..1....2..3....0..3....1..3....0..1....3..2....1..2
..0..3....0..3....2..2....1..3....1..0....1..1....2..0....3..2....3..1....3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 16 2014
STATUS
approved