Number of Dyck n-paths all of whose ascents have lengths equal to 1 (mod 5).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =8a(8) =29a(9) =85a(10) =211a(11) =464a(12) =943a(13) =1873a(14) =3914a(15) =9101a(16) =23298a(17) =61915a(18) =162283a(19) =409888a(20) =996456a(21) =2360486a(22) =5555333a(23) =13244114a(24) =32357022a(25) =80958851a(26) =205389082a(27) =522000262a(28) =1317987172a(29) =3297123652