Number of permutations of length n with exactly 5 occurrences of the pattern 2-13.
A120813
Number of permutations of length n with exactly 5 occurrences of the pattern 2-13.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =12a(6) =352a(7) =5392a(8) =59670a(9) =541044a(10) =4285127a(11) =30772896a(12) =205200710a(13) =1291195620a(14) =7754735430a(15) =44827592160a(16) =251003101440
External references
- oeis: A120813