OFFSET
0,1
FORMULA
a(n+2) = a(n)*a(n+1) - a(n) - a(n+1) + 2.
Binet type formula: log_2(a(n)-1) = r^n - s^n where r and s are the roots of x^2-x-1 = 0. (This is true the definition).
MATHEMATICA
Table[1 + 2^LucasL[n], {n, 0, 11}] (* T. D. Noe, Sep 17 2013 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
M. Tamba and Yeshwant Shivrai Valaulikar, Sep 04 2013
STATUS
approved