OFFSET
1,1
LINKS
FORMULA
a(n) = 5*6^floor((n-1)/2).
a(n) = 6*a(n-2). G.f. -5*x*(x+1)/(6*x^2-1). [Colin Barker, Feb 15 2013]
MATHEMATICA
LinearRecurrence[{0, 6}, {5, 5}, 30] (* Harvey P. Dale, Dec 09 2023 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Martin Renner, May 02 2006
EXTENSIONS
More terms from Colin Barker, Feb 15 2013
STATUS
approved