5-Modular Catalan Numbers C_{n,5}.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =42a(6) =131a(7) =420a(8) =1375a(9) =4576a(10) =15431a(11) =52603a(12) =180957a(13) =627340a(14) =2189430a(15) =7685785a(16) =27118855a(17) =96123508a(18) =342099955a(19) =1221979374a(20) =4379357895a(21) =15742077045a(22) =56742085710a(23) =205041235750a(24) =742647580815