Number of primitive (aperiodic) reversible string structures with n beads using a maximum of six different colors.
A056335
Number of primitive (aperiodic) reversible string structures with n beads using a maximum of six different colors.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =31a(5) =112a(6) =466a(7) =2124a(8) =10476a(9) =55058a(10) =301632a(11) =1703989a(12) =9819215a(13) =57364723a(14) =338134486a(15) =2005132504a(16) =11937364183a(17) =71254885362a(18) =426063226936
External references
- oeis: A056335