Number of permutations of [n] having a shortest ascending run of length 4.
A228671
Number of permutations of [n] having a shortest ascending run of length 4.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =69a(5) =250a(6) =418a(7) =658a(8) =34649a(9) =266267a(10) =1369372a(11) =5082045a(12) =76637635a(13) =876858377a(14) =7147459470a(15) =47396097511a(16) =552146011437
External references
- oeis: A228671