a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026714.
A027204
a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026714.
Terms
- a(0) =1a(1) =14a(2) =114a(3) =846a(4) =5217a(5) =33058a(6) =185624a(7) =1101526a(8) =5929477a(9) =34039034a(10) =179226693a(11) =1009890836a(12) =5250600651a(13) =29257284226a(14) =150953226411a(15) =835291570006
External references
- oeis: A027204