41015

Appears in sequences

• Numbers k such that j(k)*phi(k) = sigma(phi(k)), j(k) = A033831(k).at n=29A033856
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and Hilbert 3-class field tower of exact length 2.at n=24A242864
• Integers of the form 8k + 7 that can be written as a sum of four distinct squares of the form m, m + 2, m + 3, m + 4, where m == 2 (mod 4).at n=24A243581
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and 3-principalization type (2241).at n=13A247689
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) whose second 3-class group is located on the sporadic part of the coclass graph G(3,2) outside of coclass trees.at n=35A247691
• Number of integer-sided pentagons having perimeter n, modulo rotations but not reflections.at n=49A293822