A290482 Odd primes that divide a record number of 3-Carmichael numbers.

3, 5, 7, 13, 31, 43, 61, 211, 421, 1171

Offset: 1

Author

Amiram Eldar, Aug 03 2017

Keywords

• nonn
• more

Comments

The corresponding numbers of 3-Carmichael numbers are: 1, 3, 6, 8, 9, 12, 16, 22, 24, 25, ... They are records of A290481.

Examples

			13 is in the sequence since it is a factor of 8 3-Carmichael numbers, more numbers than for any prime below it: 3 and 11 are factors of a single 3-Carmichael number, 5 is a factor of 3 numbers, and 7 of 6 numbers.
		

Crossrefs

Cf. A065091 (Odd primes), A087788 (3-Carmichael numbers), A290481.

Extensions

a(10) from Amiram Eldar, Jun 29 2019