A361119 - OEIS

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

A361119

a(n) is the least prime factor of A360519(n) with a(1) = 1.

3

1, 2, 2, 5, 3, 2, 2, 5, 3, 2, 2, 7, 3, 3, 2, 2, 11, 3, 2, 2, 7, 5, 2, 2, 7, 3, 2, 2, 13, 3, 2, 2, 5, 3, 2, 2, 11, 5, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2, 5, 7, 2, 2, 5, 7, 2, 2, 3, 5, 2, 2, 3, 5, 2, 2, 3, 7, 2, 2, 3, 5, 2, 2, 7, 5

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

See A361120 for the greatest prime factors.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program

FORMULA

a(n) = A020639(A360519(n)).

EXAMPLE

A360519(2) = 2*3 so a(2) = 2.

PROG

(PARI) See Links section.

CROSSREFS

Cf. A020639, A360519, A361120.

Sequence in context: A132850 A076561 A132851 * A293833 A146316 A258803

Adjacent sequences: A361116 A361117 A361118 * A361120 A361121 A361122

KEYWORD

nonn

AUTHOR

Scott R. Shannon, Rémy Sigrist and N. J. A. Sloane, Mar 03 2023

STATUS

approved