48016

Appears in sequences

• Third row of Pascal-(1,2,1) array A081577.at n=22A081583
• Numbers n such that phi(phi(n)) + sigma(sigma(n)) is a 4th power.at n=26A172464
• The continued fraction expansion of tanh(Pi) requires the computation of the pairs (p_n, q_n); sequence gives values of q_n.at n=6A190352
• Number of subsets of {1..n} such that only one set can be obtained by choosing a different prime factor of each element.at n=23A370584