Number of fixed points in all cycle-up-down permutations of {1,2,...,n}.
A186365
Number of fixed points in all cycle-up-down permutations of {1,2,...,n}.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =6a(4) =20a(5) =80a(6) =366a(7) =1904a(8) =11080a(9) =71424a(10) =505210a(11) =3891712a(12) =32433180a(13) =290787328a(14) =2791053734a(15) =28556359680a(16) =310264194320
External references
- oeis: A186365