1,3

a(n) = A000720(A001951(A000040(n))) - A000720(A049472(A000040(n))).

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

Sequence in context: A236919 A138304 A054860 * A029158 A241953 A156197

Adjacent sequences: A098742 A098743 A098744 * A098746 A098747 A098748

nonn

Reinhard Zumkeller, Oct 01 2004

approved