27355

Appears in sequences

• Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 1 (mod 4).at n=54A035546
• Number of n X n arrays of squares of integers with every 3X3 subblock summing to 8.at n=2A159208
• Number of n X n arrays of squares of integers with every (n-2)X(n-2) subblock summing to 8.at n=1A159373
• Absolute discriminants of complex quadratic fields with 3-class group of elementary abelian type (3,3) of rank 2.at n=29A242863
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3), 3-principalization type (4443), IPAD [(3,3,3)^3, (3,9)], and Hilbert 3-class field tower of unknown length at least 3.at n=4A242873
• 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=18A247691
• Position of first occurrence of n in A072347.at n=37A272530
• a(n) = 25*n^2/2 - 11*n/2 + 1.at n=47A383465