Number of frieze patterns of length n under a certain group (see Pisanski et al. for precise definition).

A123045

Number of frieze patterns of length n under a certain group (see Pisanski et al. for precise definition).

Terms

    a(0) =0a(1) =2a(2) =6a(3) =12a(4) =39a(5) =104a(6) =366a(7) =1172a(8) =4179a(9) =14572a(10) =52740a(11) =190652a(12) =700274a(13) =2581112a(14) =9591666a(15) =35791472a(16) =134236179a(17) =505290272a(18) =1908947406a(19) =7233629132a(20) =27488079132a(21) =104715393912a(22) =399823554006

External references