Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with seven.
A292173
Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with seven.
Terms
- a(0) =189a(1) =627a(2) =1633a(3) =4291a(4) =12146a(5) =38795a(6) =129520a(7) =469662a(8) =1281977a(9) =3286121a(10) =8402785a(11) =21706131a(12) =58633404a(13) =157849186a(14) =439490771a(15) =1128233084a(16) =2793077829a(17) =6823503775a(18) =16758669067a(19) =41349963758a(20) =101704832977a(21) =255372664080a(22) =622178277449
External references
- oeis: A292173