E.g.f. Sum_{d|M} (exp(d*x)-1)/d, M=15.

A141014

E.g.f. Sum_{d|M} (exp(d*x)-1)/d, M=15.

Terms

    a(0) =0a(1) =4a(2) =24a(3) =260a(4) =3528a(5) =51332a(6) =762744a(7) =11406980a(8) =170939688a(9) =2563287812a(10) =38445332184a(11) =576660215300

External references