Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the consecutive step pattern {up}^2.
A230621
Number of permutations of [n] with exactly two (possibly overlapping) occurrences of the consecutive step pattern {up}^2.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =8a(6) =86a(7) =803a(8) =8221a(9) =86214a(10) =966114a(11) =11405511a(12) =142934124a(13) =1892755874a(14) =26487024478a(15) =390658292572
External references
- oeis: A230621