F(4n+4)/F(4)-F(3n+3)/F(3) where F(n)=A000045(n).

A114849

F(4n+4)/F(4)-F(3n+3)/F(3) where F(n)=A000045(n).

Terms

    a(0) =0a(1) =3a(2) =31a(3) =257a(4) =1950a(5) =14164a(6) =100464a(7) =702919a(8) =4878575a(9) =33695365a(10) =232040622a(11) =1595043816a(12) =10952137040a(13) =75149854091a(14) =515435467055

External references