Positions of non-crossing fixed-point-free involutions encoded by A014486 in A055089. Permutation of A064640.

A064638

Positions of non-crossing fixed-point-free involutions encoded by A014486 in A055089. Permutation of A064640.

Terms

    a(0) =0a(1) =1a(2) =7a(3) =23a(4) =127a(5) =415a(6) =143a(7) =659a(8) =719a(9) =5167a(10) =16687a(11) =5455a(12) =26815a(13) =28495a(14) =5183a(15) =16703a(16) =5699a(17) =36899a(18) =38579a(19) =5759a(20) =36959a(21) =40031a(22) =40319a(23) =368047a(24) =1174447a(25) =379567a(26) =1901647a(27) =1992367a(28) =368335a(29) =1174735

External references