BBC Russian

Svoboda | Graniru | BBC Russia | Golosameriki | Facebook

The OEIS is supported by the many generous donors to the OEIS Foundation.

A356315

a(n) = 1 if n divides the least j >= n such that n and A276086(j) are coprime, otherwise 0. Here A276086 is the primorial base exp-function.

1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1`
	LINKS	`Antti Karttunen, Table of n, a(n) for n = 1..65537` `Index entries for characteristic functions` `Index entries for sequences related to primorial base`
	FORMULA	`a(n) = [0 == A356309(n) (mod n)], where [ ] is the Dirichlet inverse.` `a(n) >= A356162(n).`
	PROG	`(PARI) A356315(n) = !(A356309(n)%n);`
	CROSSREFS	`Characteristic function of A356316, whose complement A356317 gives the positions of zeros.` `Cf. A002110, A276086, A356162, A356302, A356309, A356313.` `Sequence in context: A359551 A353458 A110242 * A273592 A279693 A368992` `Adjacent sequences: A356312 A356313 A356314 * A356316 A356317 A356318`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen, Nov 04 2022`
	STATUS	`approved`

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 8 22:12 EDT 2024. Contains 375759 sequences. (Running on oeis4.)