0,3

The size of a largest orbit to which Vaille's automorphism partitions the set of A000108(n) Dyck paths of semilength n.

For n>0, it seems that a(2n) = 2*A126296(2n).

Sequence in context: A056700 A140989 A130089 this_sequence A083265 A067391 A096361

Adjacent sequences: A126289 A126290 A126291 this_sequence A126293 A126294 A126295

nonn

Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), Jan 02 2007