A341991 Multiplicative defect in a natural approximation for the terms of A341617.

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

Offset: 1

Author

Thomas Ward, Feb 25 2021

Keywords

• nonn
• more

Comments

A coarse approximation to A341617(n) is the primorial of (n-1), and the terms of this sequence are the quotient A341617(n) divided by the primorial of (n-1).

Examples

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

Links

• P. Miska and T. Ward, Stirling numbers and periodic points, arXiv:2102.07561 [math.NT], 2021.

Crossrefs

Cf. A341617, A000142, A007947, A002110.

Formula

a(n) = A341617(n)/radical((n-1)!) = A341617(n)/(n-1)# = A341617(n)/A002110(n-1).