7th row of number array A083064.

Terms

a(0) =1a(1) =7a(2) =55a(3) =439a(4) =3511a(5) =28087a(6) =224695a(7) =1797559a(8) =14380471a(9) =115043767a(10) =920350135a(11) =7362801079a(12) =58902408631a(13) =471219269047