OFFSET
1,2
COMMENTS
Column 2 of A211700
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
G.f.: 1/x/W(0)-1/x, where W(k) = 1 - x - x^2/(1 - x^2*(k+1)/W(k+1) ); (continued fraction). - Sergei N. Gladkovskii, Nov 10 2014
EXAMPLE
All solutions for n=5
..0....0....0....0....0....0....0....0....0....0....0
..0....0....0....0....0....0....0....0....0....0....0
..0....0....1....0....1....0....0....0....1....1....1
..1....1....1....1....1....0....0....0....1....1....1
..1....1....2....1....1....0....1....0....0....1....1
..2....1....2....0....2....0....1....1....0....1....0
..2....1....2....0....2....0....1....1....0....1....0
G.f. = x + 2*x^2 + 3*x^3 + 6*x^4 + 11*x^5 + 23*x^6 + 47*x^7 + 103*x^8 + ...
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 19 2012
STATUS
approved