155536domain: NAppears in sequencesa(n) = ceiling((1 + sum of preceding terms) / 2) starting with a(0) = 1.at n=30A005428a(n) = ceiling((Sum_{k=1..n-1} a(k)) / 2) for n >= 2 starting with a(1) = 1.at n=31A073941Subsequence of A005428 with state = 1.at n=15A081614a(n) = Sum_{k=0..n} 2^k * binomial(2*k+1,2*n-2*k+1).at n=8A387767