Engel expansion of exp(e).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =1a(12) =1a(13) =1a(14) =1a(15) =7a(16) =13a(17) =27a(18) =45a(19) =212a(20) =388a(21) =735a(22) =3422a(23) =3913a(24) =11095a(25) =18232a(26) =20624a(27) =54745a(28) =426826a(29) =617936