88559

Appears in sequences

• Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1.at n=24A006972
• Quasi-Carmichael numbers to base 9: squarefree composites n such that (n,2*3*5*7) = 1 and prime p|n ==> p-9|n-9.at n=11A029554
• Numerators of convergents to A058914.at n=28A048817
• Number of interior balls in a truncated octahedral arrangement.at n=17A093033
• Lucas-Carmichael numbers with 3 prime factors.at n=17A216925
• Numbers such that the sequence of all possible sums of divisors of n is increasing but not strictly so, the sums being ordered by their characteristic functions, seen as binary numbers (see example).at n=31A230492
• Quasi-Carmichael numbers to at least one negative base and at least one positive base.at n=18A257759