Number of permutations of [n] with exactly one occurrence of the consecutive step pattern up, down, up, down.
A230832
Number of permutations of [n] with exactly one occurrence of the consecutive step pattern up, down, up, down.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =16a(6) =192a(7) =1472a(8) =12800a(9) =132352a(10) =1366016a(11) =14781952a(12) =178102272a(13) =2282645504a(14) =30639611904a(15) =440041603072
External references
- oeis: A230832