Positions of involutions (permutations whose square is the identity) in reverse colexicographic order (A055089/A195663).

A014489

Positions of involutions (permutations whose square is the identity) in reverse colexicographic order (A055089/A195663).

Terms

    a(0) =0a(1) =1a(2) =2a(3) =5a(4) =6a(5) =7a(6) =14a(7) =16a(8) =21a(9) =23a(10) =24a(11) =25a(12) =26a(13) =29a(14) =54a(15) =55a(16) =60a(17) =67a(18) =80a(19) =82a(20) =86a(21) =94a(22) =105a(23) =107a(24) =111a(25) =119a(26) =120a(27) =121a(28) =122a(29) =125

External references