Number of Catalan M-paths.

Terms

a(0) =1a(1) =2a(2) =11a(3) =75a(4) =578a(5) =4791a(6) =41657a(7) =374728a(8) =3458073a(9) =32553979a(10) =311399612a(11) =3018079529a(12) =29573648337a(13) =292494535982