

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

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


CROSSREFS

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 & shell script. M. F. Hasler, Oct 18 2008
a(22)a(28) from Max Alekseyev, Dec 16 2011


STATUS

approved



