a(n) = Sum_{k=0..floor(n/2)} k^(2*n).

A352983

a(n) = Sum_{k=0..floor(n/2)} k^(2*n).

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =257a(5) =1025a(6) =535538a(7) =4799354a(8) =4338079554a(9) =69107159370

External references