599256domain: NAppears in sequencesTheta series of extremal lattice of dimension 14, level 7 and minimal norm 6.at n=10A169719E.g.f.: Series_Reversion( x + Sum_{n>=2} (-1)^(n-1) * x^(2*n-1)/(n*(n-1)) ) = Sum_{n>=1} a(n)*x^(2*n-1)/(2*n-1)!.at n=4A277413