OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (1,0,0,1,-1).
FORMULA
a(n) = 2*A047328(n). G.f. 2*x^2*(3+2*x+x^2+x^3) / ( (1+x)*(x^2+1)*(x-1)^2 ). - R. J. Mathar, Oct 08 2011
MATHEMATICA
With[{c=14*Range[0, 20]}, Union[Flatten[{c, c+6, c+10, c+12}]]] (* Harvey P. Dale, Dec 25 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Jan.Hagberg(AT)stat.su.se
EXTENSIONS
Corrected by R. J. Mathar, Oct 08 2011
STATUS
approved