OFFSET
1,1
COMMENTS
In most of the cases the n-th power that divides a(n)^3-1 is 2^n.
FORMULA
a(n) = A088038(n)^(1/3).
Conjecture: a(n) = 2^n+1 for n>2. a(n) = 3*a(n-1)-2*a(n-2) for n>4. G.f.: -x*(2*x^3-x^2+2*x-2) / ((x-1)*(2*x-1)). [Colin Barker, Feb 05 2013]
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Sep 19 2003
EXTENSIONS
Corrected and extended by Ray Chandler, Oct 04 2003
STATUS
approved