Number of permutations of 1..n arranged in a circle with exactly 7 adjacent element pairs in decreasing order.
A151580
Number of permutations of 1..n arranged in a circle with exactly 7 adjacent element pairs in decreasing order.
Terms
- a(0) =0a(1) =8a(2) =2223a(3) =146080a(4) =5007112a(5) =116857368a(6) =2112659718a(7) =31852408056a(8) =419567641380
External references
- oeis: A151580