113578domain: NAppears in sequencesExpansion of 1/(1 - 3*x - x^2 + x^3).at n=10A033505Floor[1/{(3+n^4)^(1/4)}], where {}=fractional part.at n=43A184538a(2*n) = A030186(n), a(2*n+1) = A033505(n).at n=21A365967