875702domain: NAppears in sequencesE.g.f. A(x) satisfies differential equation A'''(x)=A(x)+1/2*A(x)^2, A(0)=0, A'(0)=1, A''(0)=1, A'''(0)=1.at n=16A200542p-INVERT of the positive integers, where p(S) = (1 - S)^2.at n=12A290917p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S - S^2 + S^3.at n=25A291241