Means referred to in A093498.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =21a(5) =3607a(6) =273a(7) =266080552a(8) =1365a(9) =3124153506a(10) =25935a(12) =25935a(14) =285285a(16) =285285a(18) =6561555