a(n) = Sum_{k=0..2n-1} T(n,k) * T(n,k+1), with T given by A026552.
A027273
a(n) = Sum_{k=0..2n-1} T(n,k) * T(n,k+1), with T given by A026552.
Terms
- a(0) =2a(1) =16a(2) =52a(3) =428a(4) =1516a(5) =12792a(6) =46936a(7) =402164a(8) =1504432a(9) =13015480a(10) =49288856a(11) =429204354a(12) =1639174304a(13) =14340670000a(14) =55108565584a(15) =483825847108
External references
- oeis: A027273