Unbranched a-4-catapolynonagons (see Brunvoll reference for precise definition).
A121123
Unbranched a-4-catapolynonagons (see Brunvoll reference for precise definition).
Terms
- a(0) =1a(1) =3a(2) =12a(3) =63a(4) =342a(5) =1998a(6) =11772a(7) =70308a(8) =420552a(9) =2521368a(10) =15120432a(11) =90710928a(12) =544218912a(13) =3265243488a(14) =19591180992a(15) =117546666048a(16) =705278316672
External references
- oeis: A121123