Triangle read by rows: T(n,k) is the number of n-bead bracelets with exactly k different colored beads.

A273891

Triangle read by rows: T(n,k) is the number of n-bead bracelets with exactly k different colored beads.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =4a(8) =6a(9) =3a(10) =1a(11) =6a(12) =18a(13) =24a(14) =12a(15) =1a(16) =11a(17) =56a(18) =136a(19) =150a(20) =60a(21) =1a(22) =16a(23) =147a(24) =612a(25) =1200a(26) =1080a(27) =360a(28) =1a(29) =28

External references