a(n) = A000045(n) * A001003(n).

Terms

a(0) =0a(1) =1a(2) =3a(3) =22a(4) =135a(5) =985a(6) =7224a(7) =55627a(8) =436653a(9) =3503666a(10) =28537245a(11) =235558347a(12) =1965437136a(13) =16552173909a(14) =140505456663