a(n) = Sum_{k=1..n} Sum_{m=1..n} (2*k - 1)^m.
A124239
a(n) = Sum_{k=1..n} Sum_{m=1..n} (2*k - 1)^m.
Terms
- a(0) =1a(1) =14a(2) =197a(3) =3704a(4) =90309a(5) =2704470a(6) =95856025a(7) =3921108576a(8) =181756280697
External references
- oeis: A124239
A124239
a(n) = Sum_{k=1..n} Sum_{m=1..n} (2*k - 1)^m.