4194326

Appears in sequences

• a(n) = 2^n + n.at n=22A006127
• Dirichlet convolution of b_n = 2^(n-1) with phi(n).at n=22A034738
• a(n) = the smallest positive multiple of n with exactly n digits when written in binary.at n=22A162213
• Where powers of 2 occur in the union of squares and powers of 2.at n=44A188917
• a(n) = 2^phi(n) + phi(n).at n=22A243307
• a(n) = A306898(n)/2.at n=22A306905
• Sum of the sizes of all subsets of [n] whose sum is divisible by n.at n=22A309122
• a(n) = Sum_{d|n} phi(n/d) * (-2)^(d-1).at n=22A382999