Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with eight.
A292174
Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with eight.
Terms
- a(0) =683a(1) =2400a(2) =6471a(3) =16817a(4) =47123a(5) =141118a(6) =469662a(7) =1609176a(8) =5935728a(9) =16491722a(10) =43160750a(11) =110362553a(12) =289385731a(13) =767677544a(14) =2119594253a(15) =5810801164a(16) =16404580983a(17) =42548928025a(18) =106693231930a(19) =263735820713a(20) =650860901400
External references
- oeis: A292174