OFFSET
0,2
LINKS
FORMULA
G.f.: [1+2x^2+4x^3]/[(1-x^2)(1-2x)]. - Ralf Stephan, Apr 03 2004
a(n+1) = 2^(n+4)/3 -7/2 +(-1)^n/6, n>0. - R. J. Mathar, May 20 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved