Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with nine.
A292175
Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with nine.
Terms
- a(0) =2621a(1) =9459a(2) =26167a(3) =69404a(4) =188735a(5) =558151a(6) =1745634a(7) =5935728a(8) =20786804a(9) =77416352a(10) =219059475a(11) =578513498a(12) =1500419043a(13) =3908857765a(14) =10470345790a(15) =28385741484a(16) =79729201108a(17) =221303407539a(18) =630847591899
External references
- oeis: A292175