Number of permutations of [n] whose lengths of increasing runs are prime numbers.
A317131
Number of permutations of [n] whose lengths of increasing runs are prime numbers.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =5a(5) =19a(6) =80a(7) =520a(8) =2898a(9) =22486a(10) =171460a(11) =1509534a(12) =14446457a(13) =147241144a(14) =1650934446a(15) =19494460567a(16) =248182635904
External references
- oeis: A317131