22443

Appears in sequences

• Numbers k such that 10^k + 6*R_k - 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=12A102939
• Partial sums of A007694.at n=42A174030
• Absolute discriminants of complex quadratic fields with 3-class rank 2.at n=27A242862
• Absolute discriminants of complex quadratic fields with 3-class group of elementary abelian type (3,3) of rank 2.at n=18A242863
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and Hilbert 3-class field tower of exact length 3, except for the cases mentioned in the COMMENTS.at n=7A242878
• G.f.: Product_{k>=1, j>=1} 1/(1 - x^(j*k^4)).at n=37A280662