Number of permutations of [n] with at least two (possibly overlapping) occurrences of the consecutive step pattern {up}^2.
A230620
Number of permutations of [n] with at least two (possibly overlapping) occurrences of the consecutive step pattern {up}^2.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =9a(6) =97a(7) =983a(8) =10616a(9) =119932a(10) =1441405a(11) =18383351a(12) =249155667a(13) =3581896559a(14) =54540748818a(15) =877824410030
External references
- oeis: A230620