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

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

Offset

0,2

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]

Links

Table of n, a(n) for n=0..8.

Formula

a(n) = A046641(10^n)

Crossrefs

Cf. A000041, A046641, A145523

Sequence in context: A144782 A218872 A075232 * A319961 A037533 A178827

Adjacent sequences: A145521 A145522 A145523 * A145525 A145526 A145527

Keyword

more,nonn

Author

M. F. Hasler, Oct 12 2008

Extensions

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

Status

approved