OFFSET
0,2
LINKS
Ray Chandler, Table of n, a(n) for n = 0..469
FORMULA
Empirical o.g.f.: (-1-1*x+2*x^2-1280*x^4+2560*x^5-46592*x^6+93184*x^7-362795008*x^11+725590016*x^12)/(2*x-1). - Simon Plouffe, Feb. 26 2011.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Walter Kehowski, Aug 14 2010
EXTENSIONS
a(23) onwards from Ray Chandler, Aug 20 2010
STATUS
approved