OFFSET
0,2
COMMENTS
Scalar curvature of quaternion Blaschke manifolds.
Numbers of the form (5*k + 3)^2 - (3*k + 5)^2. - Bruno Berselli, Dec 11 2011
LINKS
M. Igarashi, On quaternion Kahlerian Blaschke manifolds.
Index entries for linear recurrences with constant coefficients, signature (3,-3,1).
FORMULA
a(n) = 16*(2*n+1)+a(n-1) (with a(0)=0). - Vincenzo Librandi, Nov 13 2010
G.f.: 16*x*(3-x)/(1-x)^3. - Bruno Berselli, Dec 11 2011
MAPLE
MATHEMATICA
a=Table[4^2*n*(n + 2), {n, 0, 28}]
LinearRecurrence[{3, -3, 1}, {0, 48, 128}, 50] (* Harvey P. Dale, Dec 24 2022 *)
PROG
(PARI) a(n)=16*n*(n+2) \\ Charles R Greathouse IV, Jun 17 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Feb 14 2006
STATUS
approved