178837201

Appears in sequences

• a(n) is the smallest Carmichael number (A002997) with the n-th prime as its smallest prime divisor, or 0 if no such number exists.at n=15A135720
• a(n) is the least Carmichael number of the form prime(n)*prime(n')*prime(n") with n < n' < n", or 0 if no such number exists.at n=16A141705
• 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=16A141706
• Carmichael numbers whose prime factors all have the form p=1+x^2+y^2 for some x,y in Z.at n=10A258839
• The largest 3-Carmichael number that is divisible by the n-th odd prime.at n=15A290485
• The least 3-Carmichael number that is divisible by the n-th odd prime, or 0 if no such number exists.at n=15A290486
• a(n) is the smallest Carmichael number k such that gpf(p-1) = prime(n) for all prime factors p of k.at n=8A327787