a(n) = Sum_{k=0..2*n-2} T(n,k) * T(n,k+2), with T given by A026584.
A027284
a(n) = Sum_{k=0..2*n-2} T(n,k) * T(n,k+2), with T given by A026584.
Terms
- a(0) =5a(1) =28a(2) =167a(3) =1024a(4) =6359a(5) =39759a(6) =249699a(7) =1573524a(8) =9943905a(9) =62994733a(10) =399936573a(11) =2543992514a(12) =16210331727a(13) =103453402718a(14) =661164765879
External references
- oeis: A027284