A109218 Numbers k such that A109217(k) is prime.

3, 23, 28, 34, 47, 86, 92, 107, 632, 723, 754, 772, 9976, 21116

Offset

1,1

Links

Table of n, a(n) for n=1..14.

Example

a(2) = 23 because A109217(23) = 1101111011111101111111 is prime.

Crossrefs

Cf. A000037, A109217.

Sequence in context: A153707 A232327 A153708 * A103361 A136090 A032688

Adjacent sequences: A109215 A109216 A109217 * A109219 A109220 A109221

Keyword

nonn,more

Author

Jason Earls, Jun 22 2005

Extensions

Terms corrected by Jinyuan Wang, Mar 22 2020

a(13)-a(14) from Michael S. Branicky, Mar 19 2024

Status

approved