Number of chiral pairs of color patterns (set partitions) for a row of length n using 5 or fewer colors (subsets).
A320935
Number of chiral pairs of color patterns (set partitions) for a row of length n using 5 or fewer colors (subsets).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =4a(4) =20a(5) =86a(6) =400a(7) =1852a(8) =8868a(9) =42892a(10) =210346a(11) =1038034a(12) =5150110a(13) =25623486a(14) =127740880a(15) =637539592a(16) =3184224728a(17) =15910524632a(18) =79520923966a(19) =397508610454
External references
- oeis: A320935