Number of Dyck n-paths all of whose ascents and descents have lengths equal to 1 (mod 8).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =2a(10) =4a(11) =7a(12) =11a(13) =16a(14) =22a(15) =29a(16) =37a(17) =47a(18) =62a(19) =87a(20) =129a(21) =197a(22) =302a(23) =457a(24) =677a(25) =980a(26) =1392a(27) =1957a(28) =2752a(29) =3907