A145524 Least integer k>0 such that A000041(k) is divisible by 10^n.

1, 9, 74, 449, 599, 11224, 55374, 3099324, 3099324

Offset: 0

Author

M. F. Hasler, Oct 12 2008

Keywords

• more
• nonn

Comments

The requirement a(n)>0 is somewhat arbitrary, chosen for agreement with A046641 ; a(n)>=0 would have been possible, too, yielding a(0)=0.

a(9) > 10^7. [From Max Alekseyev, Oct 18 2008]

Crossrefs

Cf. A000041, A046641, A145523

Formula

a(n) = A046641(10^n)

Extensions

a(6)..a(8) from Max Alekseyev, Oct 18 2008