A357988 a(n) is the unique k such that A357579(k) = prime(n) (the n-th prime number), or -1 if no such k exists.

1, 2, 4, 3, 8, 12, 9, 16, 15, 21, 26, 24, 30, 34, 43, 40, 45, 47, 53, 67, 59, 64, 70, 74, 84, 94, 89, 96, 93, 107, 110, 112, 120, 128, 124, 134, 137, 148, 156, 150, 163, 161, 170, 174, 180, 186, 189, 208, 201, 209, 213, 207, 222, 219, 240, 244, 245, 247, 250

Offset: 1

Author

Rémy Sigrist, Oct 23 2022

Keywords

• nonn

Examples

			A357579(53) = 67 = prime(19), so a(19) = 53.
		

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..5000
• Rémy Sigrist, C program
• Rémy Sigrist, PARI program

Crossrefs

Cf. A357579, A357986.

Programs

C

See Links section.

PARI

See Links section.

Formula

a(n) = A357986(prime(n)).