a(n) = T(4n,n), where T is the array defined in A026082.
A026091
a(n) = T(4n,n), where T is the array defined in A026082.
Terms
- a(0) =1a(1) =1a(2) =18a(3) =183a(4) =1927a(5) =20655a(6) =224498a(7) =2465815a(8) =27304863a(9) =304313548a(10) =3409370698a(11) =38362211823a(12) =433219457730
External references
- oeis: A026091