A361119 a(n) is the least prime factor of A360519(n) with a(1) = 1.

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

Offset: 1

Author

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

Keywords

• nonn

Comments

See A361120 for the greatest prime factors.

Examples

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

Links

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

Crossrefs

Cf. A020639, A360519, A361120.

Programs

PARI

See Links section.

Formula

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