Number of Dyck n-paths all of whose ascents and descents have lengths equal to 1 (mod 10).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =2a(12) =4a(13) =7a(14) =11a(15) =16a(16) =22a(17) =29a(18) =37a(19) =46a(20) =56a(21) =68a(22) =85a(23) =112a(24) =156a(25) =226a(26) =333a(27) =490a(28) =712a(29) =1016