Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most six elements.
A276840
Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most six elements.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =2520a(8) =8400a(9) =28728a(10) =103050a(11) =390555a(12) =1566813a(13) =5994636a(14) =22318676a(15) =82337580a(16) =304360184a(17) =1134352752a(18) =4275368704a(19) =16107425628a(20) =60453074344a(21) =226179710040a(22) =845165016029
External references
- oeis: A276840