Position of n-th 5 in A030567.

Terms

a(0) =5a(1) =16a(2) =28a(3) =40a(4) =52a(5) =55a(6) =57a(7) =59a(8) =61a(9) =63a(10) =64a(11) =65a(12) =81a(13) =99a(14) =117a(15) =135a(16) =153a(17) =157a(18) =160a(19) =163a(20) =166a(21) =169a(22) =171a(23) =172a(24) =189a(25) =207a(26) =225a(27) =243a(28) =261a(29) =265