OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (12,-54,115,-132,108,-59,24,-6,1).
FORMULA
a(n) = Sum_{i=1..n} A030279(i).
G.f.: x*(x-1)^2*(x+1)*(x^3-4*x^2+2*x-1) / (x^3-2*x^2+4*x-1)^3. - Colin Barker, Apr 21 2013
MATHEMATICA
LinearRecurrence[{12, -54, 115, -132, 108, -59, 24, -6, 1}, {1, 9, 59, 335, 1732, 8404, 38969, 174637, 762063}, 30] (* Harvey P. Dale, Nov 07 2022 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jonathan Vos Post, Mar 25 2010
STATUS
approved