A374264 a(n) is the smallest m such that A374167(m) = n, or -1 if no such m exists.

2, 1, 15, 36, 3120, 551, 9608, 2521095, 17338312921

Offset: 2

Author

Jon E. Schoenfield, Jul 02 2024

Keywords

• nonn
• hard
• more

Comments

For n > 9, a(n) exceeds primepi(10^10) = 455052511 or is -1.

Conjecture: a(n) is never -1.

Examples

			a(5) = 36 because the first 5 that appears in A374167 is A374167(36).
		

Crossrefs

Cf. A235266, A374167.

Extensions

a(10) from Michael S. Branicky, Jul 05 2024