392941

Appears in sequences

• Lexicographically earliest sequence of pairwise coprime triangular numbers.at n=37A034792
• Triangular numbers that are also brilliant (A078972).at n=36A113940
• Product p*q of two primes with q = 2*p + 1.at n=23A156592
• Triangular numbers which are sums of three consecutive primes.at n=18A167788
• Semiprimes of form p*q with p < q, such that 2^p - 1 == 0 (mod q).at n=30A179768
• Numbers n such that A229964(n) = 1.at n=26A229965
• Squarefree numbers (from A005117) with prime divisors in a 2p+1 progression.at n=29A231966
• Numbers n with the property that the symmetric representation of sigma(n) has four parts, each of width one and two regions meet at the center of the Dyck path.at n=42A264104
• Triangular numbers that are the product of two distinct prime numbers of the form 4*k + 3.at n=12A365849
• Triangular numbers that are emirpimes.at n=15A375385