OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (3,3,-15,6,12,-8).
FORMULA
a(n) = Sum_{i=0..n} A005985(i).
G.f.: x*(1+2*x-4*x^2+4*x^3)/((1-x)^2*(1+x)*(1-2*x)^2*(1+2*x)). - Colin Barker, Jan 14 2012
a(n) = 3*a(n-1)+ 3*a(n-2)- 15*a(n-3)+ 6*a(n-4)+12*a(n-5)-8*a(n-6). - Harvey P. Dale, Jun 11 2015
MATHEMATICA
Accumulate[LinearRecurrence[{2, 5, -10, -4, 8}, {0, 1, 4, 9, 32}, 40]] (* or *) LinearRecurrence[{3, 3, -15, 6, 12, -8}, {0, 1, 5, 14, 46, 111}, 40] (* Harvey P. Dale, Jun 11 2015 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jonathan Vos Post, Apr 22 2010
STATUS
approved