88456

Appears in sequences

• G.f. = theta_4(0,x^4)/theta_4(0,x).at n=34A103258
• a(n) = (a(n-1) + a(n-3))/gcd(a(n-1), a(n-3)) with a(0) =2, a(1) = 3, a(2) = 5.at n=65A214331
• Number of cyclic subgroups of the group GL(2, Z(n)), counting conjugates as distinct.at n=37A316560
• Number of subsets of {1..n} such that a unique set can be obtained by choosing a different binary index of each element.at n=28A370638