Number of Type I (singly-even) self-dual binary codes of length 2n.

A269455

Number of Type I (singly-even) self-dual binary codes of length 2n.

Terms

    a(0) =1a(1) =3a(2) =15a(3) =105a(4) =2295a(5) =75735a(6) =4922775a(7) =625192425a(8) =163204759575

External references