1,1

Kenneth H. Rosen, Elementary Number Theory and Its Applications, Addison-Wesley, 1984, page 426 (but beware of errors!).

Table of n, a(n) for n=1..48.

Sequence in context: A057930 A332480 A233593 * A050931 A072864 A232437

Adjacent sequences: A013648 A013649 A013650 * A013652 A013653 A013654

nonn

Clark Kimberling

approved