19625

Appears in sequences

• Numbers n such that 6*10^n + R_n + 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=14A103027
• Triangle in which row n lists the numbers of strong vertex magic total labelings of each 2-regular simple graph on 2n+1 vertices.at n=46A177741
• Number of 4-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero.at n=23A208598
• Total number of parts of multiplicity 4 in all partitions of n.at n=40A222704
• Let p = n-th prime == 3 mod 8; a(n) = (sum of quadratic residues mod p that are < p/2) + (sum of all quadratic residues mod p).at n=14A282727
• a(0) = 1; a(n) = 5 * Sum_{k=1..n} binomial(n,k) * a(k-1).at n=5A344840