OFFSET
0,1
COMMENTS
Volume of fundamental region for a sequence of 3-D lattices that converges to the FCC lattice.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).
FORMULA
G.f.: (3+49*x+1188*x^2+4490*x^3+4595*x^4+1125*x^5+70*x^6)/(1-x)^7. - Bruno Berselli, Mar 23 2012
MATHEMATICA
Table[(n^2+1)(4n^2+1)(4n^2+3), {n, 0, 30}] (* Harvey P. Dale, Mar 22 2012 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Nov 17 2008
STATUS
approved