Number of n-permutations which fix at least one odd prefix.
A236921
Number of n-permutations which fix at least one odd prefix.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =2a(4) =10a(5) =32a(6) =232a(7) =992a(8) =10096a(9) =53408a(10) =727360a(11) =4569536a(12) =79501696a(13) =578101376a(14) =12337163008a(15) =101945840384
External references
- oeis: A236921