1,2

a(n) = A000005(A003586(n));

a(n) = if A086414(n)=A086415(n) then A086414(n)+1 else (A086414(n)+1)*(A086415(n)+1);

a(n) = (A022328(n)+1)*(A022329(n)+1).

Table of n, a(n) for n=1..75.

Cf. A086417.

Sequence in context: A069581 A243220 A085430 * A168148 A147968 A065167

Adjacent sequences: A086413 A086414 A086415 * A086417 A086418 A086419

nonn

Reinhard Zumkeller, Jul 18 2003

approved