75844domain: NAppears in sequencesINVERT transform (with offset) of quadruple factorials (A008545), where g.f. satisfies: A(x) = 1 + x*[d/dx x*A(x)^4]/A(x)^4.at n=6A112938Expansion of Product_{k>=0} 1/(1-x^(4*k+1))^4.at n=27A261636a(n) = Sum_{d|n} d^2 * (d+1)/2.at n=52A278403