OFFSET
0,3
COMMENTS
a(2n+1)=A006516(n+1).
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,12,0,-52,0,96,0,-64).
FORMULA
G.f.: x(1+2x-6x^2+8x^3+8x^4-32x^5)/((1-2x^2)(1-4x^2)(1-6x^2+8x^4)); a(n)=12a(n-2)-52a(n-4)+96a(n-6)-64a(n-8).
MATHEMATICA
LinearRecurrence[{0, 12, 0, -52, 0, 96, 0, -64}, {0, 1, 2, 6, 32, 28, 248, 120}, 40] (* Harvey P. Dale, Dec 03 2015 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Jun 23 2005
STATUS
approved