Number of permutations of 1..n+4 with the number moved left exceeding the number moved right by n or more.

A179579

Number of permutations of 1..n+4 with the number moved left exceeding the number moved right by n or more.

Terms

    a(0) =37a(1) =73a(2) =142a(3) =276a(4) =539a(5) =1059a(6) =2092a(7) =4150a(8) =8257a(9) =16461a(10) =32858a(11) =65640a(12) =131191a(13) =262279a(14) =524440a(15) =1048746a(16) =2097341a(17) =4194513a(18) =8388838a(19) =16777468a(20) =33554707a(21) =67109163a(22) =134218052a(23) =268435806a(24) =536871289a(25) =1073742229a(26) =2147484082a(27) =4294967760

External references