Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the generalized pattern 12-3.
A264451
Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the generalized pattern 12-3.
Terms
- a(0) =1a(1) =13a(2) =112a(3) =843a(4) =6089a(5) =43887a(6) =321357a(7) =2411686a(8) =18631631a(9) =148490575a(10) =1221894598a(11) =10382648734a(12) =91073271181a(13) =824221683639
External references
- oeis: A264451