OFFSET
1,1
EXAMPLE
a(1)=2 since (2, 1, 1, 1, 1) is a solution of a^2 + b^2 + c^2 + d^2 + e^2 = 4*a*b*c*d*e. a(2)=7 since (7, 2, 1, 1, 1) is a solution. a(3)=26 since (26,7,1,1,1) is a solution.
CROSSREFS
KEYWORD
nonn
AUTHOR
Shanzhen Gao, Sep 17 2013
STATUS
approved