The order of the semigroup of orientation-preserving full transformations on n elements.

A289715

The order of the semigroup of orientation-preserving full transformations on n elements.

Terms

    a(0) =1a(1) =4a(2) =24a(3) =128a(4) =610a(5) =2742a(6) =11970a(7) =51424a(8) =218718a(9) =923690a(10) =3879766a(11) =16224804a(12) =67603744a(13) =280816018a(14) =1163381190a(15) =4808642880a(16) =19835652598a(17) =81676217394a(18) =335780005758

External references