11011101110domain: NAppears in sequencesa(1) = 1, a(n) is the smallest number coprime to n and beginning with a(n-1).at n=10A081933a(n) = Sum_{m=0..n} 3^v3(m!), where v3(m!) is the exponent of the highest power of 3 dividing n!, expressed in base 3.at n=23A294493