Number of palstars of length 2n over an alphabet of size 4.
A246021
Number of palstars of length 2n over an alphabet of size 4.
Terms
- a(0) =1a(1) =4a(2) =28a(3) =208a(4) =1540a(5) =11440a(6) =84976a(7) =631360a(8) =4690972a(9) =34854352a(10) =258971536a(11) =1924189120a(12) =14296956112a(13) =106228114624a(14) =789287772352
External references
- oeis: A246021