Number of aperiodic bracelets (turn over necklaces) with n beads of 4 colors.

A032295

Number of aperiodic bracelets (turn over necklaces) with n beads of 4 colors.

Terms

    a(0) =4a(1) =6a(2) =16a(3) =45a(4) =132a(5) =404a(6) =1296a(7) =4380a(8) =15064a(9) =53622a(10) =192696a(11) =703895a(12) =2589300a(13) =9606744a(14) =35824088a(15) =134297280a(16) =505421340a(17) =1909194056a(18) =7234153416a(19) =27489073899a(20) =104717489748a(21) =399827555604

External references