1,1

Let x(0)=1 and x(k) = lcm(x(k-1), d(k)) with 1 <= k <= A000005(n), where d(k) = (k-th divisor of n): A057643(n)=x(A000005(n)) and a(n) = Min{x(i): x(i)>n}.

a(n) = n+1 iff n is an odd prime;

A057643(n) = x(A000005(n)) and a(n) = Min{x(i): x(i)>n}.

Table of n, a(n) for n=1..66.

Cf. A027750.

Sequence in context: A319376 A110633 A240232 * A059773 A127399 A240751

Adjacent sequences: A119247 A119248 A119249 * A119251 A119252 A119253

nonn

Reinhard Zumkeller, May 10 2006

approved