36765901

Appears in sequences

• Carmichael numbers which are also base-2 strong pseudoprimes.at n=14A063847
• a(n) is the largest Carmichael number of the form prime(n)*prime(n')*prime(n") with n < n' < n", or 0 if no such number exists.at n=11A141706
• Carmichael numbers whose prime factors all have the form p=1+x^2+y^2 for some x,y in Z.at n=6A258839
• The largest 3-Carmichael number that is divisible by the n-th odd prime.at n=10A290485
• Carmichael numbers m such that A309132(m) < m.at n=26A309268
• Odd composite numbers k such that A111076(k)^((k-1)/2) == -1 (mod k).at n=5A329538
• Odd squarefree composite numbers k such that p-1 divides k-1 and p-1 does not divide (k-1)/2 for every prime p|k.at n=10A329799
• The greater of twin Carmichael numbers: a pair of consecutive Carmichael numbers (A002997) without a non-prime-power weak Carmichael number (A087442) between them.at n=23A365023
• Carmichael numbers with exactly 3 prime factors, p*q*r, such that p-1, q-1 and r-1 have an equal 2-adic valuation.at n=10A382791