Number of permutations of [n] in which the length of every increasing run is 0 or 1 (mod 6).
A322262
Number of permutations of [n] in which the length of every increasing run is 0 or 1 (mod 6).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =14a(8) =98a(9) =546a(10) =2562a(11) =10626a(12) =41118a(13) =174174a(14) =1093092a(15) =10005996a(16) =98041944a(17) =889104216a(18) =7315812504a(19) =55893493656a(20) =421564046904
External references
- oeis: A322262