60491

Appears in sequences

• a(n) = (12*n+1)*(12*n+11).at n=20A001538
• a(n) = least semiprime with factors not previously used containing integers 2n and 2n+1 as substrings.at n=12A086887
• a(n) = prime(2*n-1)*prime(2*n).at n=26A089581
• Products of two successive primes that can be partitioned in sum of three distinct primes which contain the prime divisors.at n=16A109068
• Numbers that can be written in more than 1 way as p^2 + 3pq + q^2 with primes p < q.at n=27A218795
• Quasi-Carmichael numbers to exactly four bases.at n=0A257754
• Least Quasi-Carmichael number to exactly n bases.at n=3A257758