OFFSET
1,2
COMMENTS
-1 +1 +1 -1 -1 +1 -1 -1
+1 +1 -1 -1 -1 -1 -1 +1
+1 +1 +1 +1 +1 +1 -1 +1
+1 -1 +1 -1 +1 -1 -1 -1
+1 -1 +1 -1 -1 +1 +1 +1
+1 +1 -1 -1 +1 +1 +1 -1
-1 +1 +1 -1 +1 -1 +1 +1
+1 +1 +1 +1 -1 -1 +1 -1
REFERENCES
S. Severini, A note on two integer sequences arising from the 3-dimensional hypercube, Technical Report, Department of Computer Science, University of Bristol, Bristol, UK (October 2003).
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,4,0,-64).
FORMULA
a(0)=1, a(1)=-1, a(2)=2, a(3)=4, a(n) = 4*a(n-2) - 64*a(n-4). - T. D. Noe, Dec 11 2006
G.f.: -x*(4*x+1)*(16*x^2-6*x+1)/(64*x^4-4*x^2+1). - Colin Barker, Aug 10 2012
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Simone Severini, Oct 25 2003
EXTENSIONS
Corrected by T. D. Noe, Dec 11 2006
STATUS
approved