333333333334domain: NAppears in sequencesExpansion of (1-7*x)/((1-x)*(1-10*x)).at n=12A093137Numbers k such that the k-th triangular number contains only digits {4,5,9}.at n=24A119209An explicit example of an infinite sequence with a(1)=1 and, for n >= 2, a(n) and S(n) = Sum_{i=1..n} a(i) have no digit in common.at n=24A308900