Number of Dyck paths of semilength n, having no ascents and no descents of length 1, and having no peaks at odd level.

A167635

Number of Dyck paths of semilength n, having no ascents and no descents of length 1, and having no peaks at odd level.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =0a(6) =5a(7) =1a(8) =14a(9) =7a(10) =43a(11) =36a(12) =143a(13) =166a(14) =509a(15) =731a(16) =1915a(17) =3158a(18) =7523a(19) =13560a(20) =30537a(21) =58257a(22) =127029a(23) =251266a(24) =538253a(25) =1089666a(26) =2313121a(27) =4754148a(28) =10051130a(29) =20868070

External references