1,1

Example a(5)=13 since x^4 + y^4 = 13k (k being a natural number) has no integer solutions 0 < x,y < 13.

Table of n, a(n) for n=1..61.

Sequence in context: A141107 A047484 A036991 * A316625 A091892 A292939

Adjacent sequences: A165884 A165885 A165886 * A165888 A165889 A165890

nonn

Carmine Suriano, Sep 29 2009

Value 11 in the example corrected to 13 by Carmine Suriano, Oct 07 2009

approved