OFFSET
1,2
COMMENTS
FORMULA
a(n) = (F(n+1)^2-F(n)^2)/(2-((n+2)^2 mod 3)), where F(n)=Fibonacci(n). [Gary Detlefs, Oct 15 2011]
Empirical G.f.: x*(3+5*x+8*x^2-12*x^3+20*x^4+x^6-x^7)/(1-17*x^3-17*x^6+x^9). [Colin Barker, Apr 15 2012]
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Sep 20 2011
STATUS
approved