A387640 A387523(n) is the a(n)-th prime number.

1, 2, 3, 4, 6, 5, 7, 8, 9, 10, 11, 14, 13, 12, 15, 19, 18, 17, 16, 21, 20, 23, 22, 30, 29, 28, 27, 26, 25, 24, 31, 37, 36, 35, 34, 33, 32, 44, 43, 42, 41, 40, 39, 38, 46, 45, 47, 54, 53, 52, 51, 50, 49, 48, 65, 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 68, 67

Offset: 1

Author

Rémy Sigrist, Sep 04 2025

Keywords

• nonn
• new

Comments

If the conjecture in A387523 is true, then the present sequence is self-inverse.

Examples

			a(42) = A000720(A387523(42)) = A000720(173) = 40.
		

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..10949
• Rémy Sigrist, PARI program

Crossrefs

Cf. A000720, A386482, A387523, A387544.

Programs

PARI

\\ See Links section.

Formula

a(n) = A000720(A387523(n)).