170496domain: NAppears in sequencesTheta series of E_8 lattice with respect to deep hole.at n=21A004017E.g.f. A(x) satisfies A(x) = x*exp(A(x) - A(x)^2) + A(x)^2.at n=5A277184Numbers k such that A000005(k) = A000688(k).at n=28A369168