a(n) is the number of permutations on [n] with at least one strong fixed point and at least one small descent.
A346204
a(n) is the number of permutations on [n] with at least one strong fixed point and at least one small descent.
Terms
- a(0) =0a(1) =0a(2) =2a(3) =5a(4) =24a(5) =128a(6) =795a(7) =5686a(8) =46090a(9) =418519a(10) =4213098a(11) =46595650a(12) =561773033a(13) =7333741536a(14) =103065052300
External references
- oeis: A346204