95526

Appears in sequences

• Number of 2 X 2 matrices with entries mod n and nonzero determinant.at n=17A005353
• Number of conjugacy classes of subgroups of the alternating group A_n.at n=16A029726
• G.f.: A(x) = x + x*ITERATE^2(x + x*ITERATE^4(x + x*ITERATE^8(x + x*ITERATE^16(x + ...)))), where ITERATE^n(F(x)) denotes the n-th iteration of F(x), and the nesting of iterations continue indefinitely.at n=6A212491
• Number of scalene triangles, distinct up to congruence, on a centered hexagonal grid of size n.at n=17A241236
• Numbers k whose sum of divisors equals the sum of divisors of 2*k-1.at n=15A289738