a(n) = A253560(A253883(n)) = A122111((2*A122111(n)) - 1).

Terms

a(0) =1a(1) =4a(2) =16a(3) =8a(4) =18a(5) =32a(6) =2048a(7) =9a(8) =128a(9) =512a(10) =100a(11) =256a(12) =2147483648a(13) =32768a(14) =54a(15) =64a(16) =1200a(17) =1024a(18) =10616832a(19) =144a(20) =1048576a(21) =864a(22) =43200a(23) =25a(24) =65536a(26) =81a(27) =4194304a(28) =644972544a(29) =131072a(30) =7260