

A341991


Multiplicative defect in a natural approximation for the terms of A341617.


1



1, 1, 1, 1, 2, 2, 1, 1, 4, 12, 6, 6, 6, 6, 3, 1, 8, 8, 12, 12, 6, 6
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OFFSET

1,5


COMMENTS

A coarse approximation to A341617(n) is the primorial of (n1), and the terms of this sequence are the quotient A341617(n) divided by the primorial of (n1).


LINKS

Table of n, a(n) for n=1..22.
P. Miska and T. Ward, Stirling numbers and periodic points, arXiv:2102.07561 [math.NT], 2021.


FORMULA

a(n) = A341617(n)/radical((n1)!) = A341617(n)/(n1)# = A341617(n)/A002110(n1).


EXAMPLE

For n = 3 it is known that A341617(3) = 2, so a(3) = 2/(31)! = 1.


CROSSREFS

Cf. A341617, A000142, A007947, A002110.
Sequence in context: A176663 A113021 A298261 * A152937 A331315 A064552
Adjacent sequences: A341988 A341989 A341990 * A341992 A341993 A341994


KEYWORD

nonn,more


AUTHOR

Thomas Ward, Feb 25 2021


STATUS

approved



