Number of primitive (aperiodic) reversible string structures with n beads using an infinite alphabet.
A276549
Number of primitive (aperiodic) reversible string structures with n beads using an infinite alphabet.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =31a(5) =112a(6) =467a(7) =2141a(8) =10739a(9) =58454a(10) =340389a(11) =2110093a(12) =13830234a(13) =95475087a(14) =691543059a(15) =5240282987a(16) =41432986587a(17) =341040306207
External references
- oeis: A276549