Main diagonal of table A060543; a(n) = C((n+1)^2-1, n*(n+1)).

A108288

Main diagonal of table A060543; a(n) = C((n+1)^2-1, n*(n+1)).

Terms

    a(0) =1a(1) =3a(2) =28a(3) =455a(4) =10626a(5) =324632a(6) =12271512a(7) =553270671a(8) =28987537150

External references