Number of permutations of length n avoiding 1234 and containing exactly 1 occurrence of 1243.
A224292
Number of permutations of length n avoiding 1234 and containing exactly 1 occurrence of 1243.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =10a(5) =71a(6) =444a(7) =2617a(8) =14958a(9) =84063a(10) =467960a(11) =2591265a(12) =14308722a(13) =78911943a(14) =435066228a(15) =2399404345a(16) =13242035030a(17) =73150006271a(18) =404525810928
External references
- oeis: A224292