603136domain: NAppears in sequencesNumbers k such that the k-th triangular number contains only digits {1,6,8}.at n=10A119143G.f.: exp( Sum_{n>=1} 4^A001511(n) * x^n/n ), where 2^A001511(n) is the highest power of 2 that divides 2*n.at n=16A217553