Number of "polyares" of order n (turning over allowed).
A057724
Number of "polyares" of order n (turning over allowed).
Terms
- a(0) =1a(1) =3a(2) =9a(3) =42a(4) =180a(5) =889a(6) =4392a(7) =22432a(8) =115469a(9) =602112a(10) =3161949a(11) =16723643a(12) =88933764a(13) =475286752a(14) =2550780323
External references
- oeis: A057724