Number of chiral pairs of color patterns (set partitions) for a row of length n using 6 or fewer colors (subsets).
A320936
Number of chiral pairs of color patterns (set partitions) for a row of length n using 6 or fewer colors (subsets).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =4a(4) =20a(5) =86a(6) =409a(7) =1976a(8) =10168a(9) =54208a(10) =299859a(11) =1699012a(12) =9808848a(13) =57335124a(14) =338073107a(15) =2004955824a(16) =11936998016a(17) =71253827696a(18) =426061036747
External references
- oeis: A320936