

A145523


Least integer k > 0 such that A000041(k) is divisible by 2^n.


2



1, 2, 11, 11, 15, 66, 66, 96, 96, 96, 96, 96, 3693, 15005, 18978, 18978, 18978, 43002, 55943, 972190, 1151214, 2799146, 15519397, 15519397, 15519397, 122101417, 210553237, 289585489, 473093534
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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(29) > 10^9.


LINKS

Table of n, a(n) for n=0..28.


FORMULA

a(n) = A046641(2^n).


PROG

(*sh*) i=1; c=1; while [ $c le 21 ]; do echo n `./A046641 $i`", "; c=`expr $c + 1`; i=`expr $i + $i`; done # M. F. Hasler, Oct 18 2008


CROSSREFS

Cf. A000041, A046641, A000123, A046063.
Sequence in context: A086862 A027828 A106371 * A168413 A265561 A265545
Adjacent sequences: A145520 A145521 A145522 * A145524 A145525 A145526


KEYWORD

more,nonn


AUTHOR

M. F. Hasler, Oct 12 2008


EXTENSIONS

More terms from M. F. Hasler, Oct 18 2008
a(22)a(28) from Max Alekseyev, Dec 16 2011


STATUS

approved



