234883

Appears in sequences

• Quasi-Carmichael numbers to base 3: squarefree composites n such that prime p|n ==> p-3|n-3.at n=22A029560
• a(n) = (1/24)*(n+1)*(3*n^3+59*n^2+358*n+648).at n=33A090949
• Quasi-Carmichael numbers to at least one negative base and at least one positive base.at n=27A257759