Triangle read by rows: T(n,k) is the number of n-bead bracelets using exactly k colors with no adjacent beads having the same color.
A330341
Triangle read by rows: T(n,k) is the number of n-bead bracelets using exactly k colors with no adjacent beads having the same color.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =0a(4) =0a(5) =1a(6) =0a(7) =1a(8) =3a(9) =3a(10) =0a(11) =0a(12) =3a(13) =12a(14) =12a(15) =0a(16) =1a(17) =10a(18) =46a(19) =90a(20) =60a(21) =0a(22) =0a(23) =9a(24) =120a(25) =480a(26) =720a(27) =360a(28) =0a(29) =1
External references
- oeis: A330341