31094251domain: NPropertiesPrimalityPrimeyesAppears in sequencesE.g.f. A(x) satisfies: [x^n] A(x)^(n*(n+1)) = 2*n * [x^(n-1)] A(x)^(n*(n+1)) for n>=1.at n=6A300873Prime numbersat n=1921379