Call two meanders from A005316 with 2n crossings equivalent if they differ by reflections in the X or Y axes. Sequence gives number of inequivalent meanders.

A078592

Call two meanders from A005316 with 2n crossings equivalent if they differ by reflections in the X or Y axes. Sequence gives number of inequivalent meanders.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =8a(4) =42a(5) =273a(6) =1970a(7) =15368a(8) =126510a(9) =1086546a(10) =9652364a(11) =88172609a(12) =824506191a(13) =7865294687a(14) =76331857094a(15) =751981532942

External references