a(n) = T(3n,n), where T is the array in A026148.
A026158
a(n) = T(3n,n), where T is the array in A026148.
Terms
- a(0) =1a(1) =2a(2) =16a(3) =120a(4) =946a(5) =7644a(6) =62831a(7) =522784a(8) =4389779a(9) =37123554a(10) =315735122a(11) =2697813440a(12) =23140821753a(13) =199142458570
External references
- oeis: A026158