OFFSET
1,1
COMMENTS
Column 2 of A223344.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 13*a(n-1) - 11*a(n-2) - 94*a(n-3) - 7*a(n-4) + 79*a(n-5) - 3*a(n-6).
Empirical g.f.: 12*x*(5 - 14*x - 50*x^2 + 5*x^3 + 41*x^4 - 2*x^5) / (1 - 13*x + 11*x^2 + 94*x^3 + 7*x^4 - 79*x^5 + 3*x^6). - Colin Barker, Aug 19 2018
EXAMPLE
Some solutions for n=3:
..4..3....4..3...12.13....3..7...13.14....7..4....4..1....8..7....8..4....8..9
..3..6....8..7....8.12....7..3...14..9....8..7....5..4....5..4....4..5....4..5
..6..3....4..3....5..8....3..7....9..5....4..3....4..2....9..8....5..9....3..4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 19 2013
STATUS
approved