2147482624domain: NAppears in sequencesa(n) = 10*a(n-2) - 16*a(n-4) for n > 3, a(0) = 1, a(1) = 5, a(2) = 14, a(3) = 34.at n=20A083332Numbers whose binary representation is the concatenation of 2n-1 digits 1 and n-1 digits 0.at n=10A147590Numerators of the positive solution to 2^(n-1) = Sum_{d|n} a(d) * a(n/d).at n=32A299151