Number of Catalan objects of size n fixed by Catalan Automorphism A057511/A057512 (deep rotation of general parenthesizations/plane trees).

A057546

Number of Catalan objects of size n fixed by Catalan Automorphism A057511/A057512 (deep rotation of general parenthesizations/plane trees).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =6a(6) =10a(7) =11a(8) =18a(9) =21a(10) =34a(11) =35a(12) =68a(13) =69a(14) =137a(15) =148a(16) =316a(17) =317a(18) =759a(19) =760a(20) =1869a(21) =1915a(22) =4833a(23) =4834a(24) =12796a(25) =12802a(26) =34108a(27) =34384a(28) =92792a(29) =92793

External references