A335116 Where records occur in A304480.

1, 2, 3, 5, 7, 13, 25, 31, 37, 61, 73, 109, 121, 145, 181, 241, 361, 421, 541, 721, 841, 1009, 1081, 1201, 1261, 1621, 1681, 2017, 2161, 2521, 3361, 3781, 5041, 6481, 7561, 8401, 10081, 12601, 15121, 25201, 30241, 42841, 45361, 55441, 60481, 75601, 85681, 100801, 110881, 128521, 131041

Offset: 1

Author

Seiichi Manyama, May 24 2020

Keywords

• nonn

Comments

a(n) is odd for n > 2.

Links

• Seiichi Manyama, Table of n, a(n) for n = 1..90
• Project Euler, Problem 533 - Minimum values of the Carmichael function
• Wikipedia, Carmichael function

Crossrefs

Cf. A002322, A304480, A335117 (records).