Engel series expansion for Sierpinski's constant.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =51a(5) =114a(6) =136a(7) =149a(8) =1388a(9) =3654a(10) =3961a(11) =41614a(12) =2975365a(13) =4120126a(14) =5760908a(15) =11210809a(16) =21235067a(17) =43239302a(18) =156258546a(19) =230627452a(20) =595763433a(21) =4709180601a(22) =148918280487a(23) =841708059551