53166

Appears in sequences

• Number of conjugacy classes in the symmetric group S_n that have even number of elements.at n=41A060643
• Number of partitions of n minus number of divisors of n.at n=41A144300
• Sum of first k numbers in column k of the natural number array A000027; by antidiagonals.at n=35A185787
• Number of (n+1) X 2 0..2 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.at n=11A186464
• Position of 30^n among 5-smooth numbers A051037.at n=21A372400