Sum of logarithmic numbers.

Terms

a(0) =1a(1) =3a(2) =9a(3) =37a(4) =153a(5) =951a(6) =5473a(7) =42729a(8) =353937a(9) =3455083a(10) =30071001a(11) =426685293a(12) =4707929449a(13) =59350096287a(14) =882391484913