450360372domain: NAppears in sequencesExpansion of 1/(1-49*x)^(1/7); related to sept-factorial numbers A045754.at n=6A034835Square array read by antidiagonals downwards: super Patalan numbers of order 7.at n=21A248329G.f. A(x) satisfies A(x) = ( 1 + 49*x*A(x)^6 )^(1/7).at n=7A385207