Sum of logarithmic numbers.

Terms

a(0) =1a(1) =4a(2) =13a(3) =50a(4) =203a(5) =1154a(6) =6627a(7) =49356a(8) =403293a(9) =3858376a(10) =33929377a(11) =460614670a(12) =5168544119a(13) =64518640406a(14) =946910125319