Diagonal of symmetric triangle A125053 located immediately below the central terms (A125054).

A125055

Diagonal of symmetric triangle A125053 located immediately below the central terms (A125054).

Terms

    a(0) =1a(1) =15a(2) =285a(3) =8475a(4) =378105a(5) =23823015a(6) =2018820885a(7) =221605991475

External references