Unbranched a-4-catapolynonagons (see Brunvoll reference for precise definition).

A121124

Unbranched a-4-catapolynonagons (see Brunvoll reference for precise definition).

Terms

    a(0) =1a(1) =4a(2) =21a(3) =138a(4) =864a(5) =5526a(6) =34992a(7) =221724a(8) =1399680a(9) =8818632a(10) =55427328a(11) =347684400a(12) =2176782336a(13) =13604912928a(14) =84894511104a(15) =528958247616

External references