Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with six.
A292172
Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with six.
Terms
- a(0) =52a(1) =166a(2) =425a(3) =1116a(4) =3392a(5) =10872a(6) =38795a(7) =102634a(8) =260334a(9) =651704a(10) =1707641a(11) =4477199a(12) =12277412a(13) =30970764a(14) =75239813a(15) =181934538a(16) =440594545a(17) =1063081418a(18) =2625678546a(19) =6286974074a(20) =14803016600a(21) =34534616815a(22) =80129926919a(23) =185059517397a(24) =431845849360a(25) =997735570874
External references
- oeis: A292172