

A145524


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


1




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



