OFFSET
0,2
COMMENTS
Coefficient expansion of the elliptical invariant for the cube.
REFERENCES
Gareth Jones and David Singerman, Bull. London Math. Soc. 28, (1996) pages 561-590 (S_4 group invariant on page 585)
H. McKean and V. Moll. Elliptic Curves, Camb. Univ. Press, p. 22.
LINKS
Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1).
FORMULA
a(n) = 256*(n-1)*(8*n^2 - 16*n + 9)/3 for n >= 3. - Emeric Deutsch, Apr 02 2006
MAPLE
a:=proc(n) if n=0 then 1 elif n=1 then 46 elif n=2 then 769 else 256*(n-1)*(8*n^2-16*n+9)/3 fi end: seq(a(n), n=0..30); # Emeric Deutsch, Apr 02 2006
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Jan 29 2006
EXTENSIONS
Corrected, edited and extended by N. J. A. Sloane, Mar 31 2006, Aug 13 2008
STATUS
approved