a(n) = Sum_{k=0..2n-1} T(n,k) * T(n,k+1), with T given by A027052.
A027079
a(n) = Sum_{k=0..2n-1} T(n,k) * T(n,k+1), with T given by A027052.
Terms
- a(0) =0a(1) =4a(2) =24a(3) =160a(4) =1136a(5) =8420a(6) =64224a(7) =499984a(8) =3952928a(9) =31634724a(10) =255682432a(11) =2083562368a(12) =17097573344a(13) =141143273396
External references
- oeis: A027079