a(n+1) = a(n) + floor(a(n)/5) with a(0)=5.

Terms

a(0) =5a(1) =6a(2) =7a(3) =8a(4) =9a(5) =10a(6) =12a(7) =14a(8) =16a(9) =19a(10) =22a(11) =26a(12) =31a(13) =37a(14) =44a(15) =52a(16) =62a(17) =74a(18) =88a(19) =105a(20) =126a(21) =151a(22) =181a(23) =217a(24) =260a(25) =312a(26) =374a(27) =448a(28) =537a(29) =644