Trajectory of 1 under map n->25n+1 if n odd, n->n/2 if n even.

Terms

a(0) =1a(1) =26a(2) =13a(3) =326a(4) =163a(5) =4076a(6) =2038a(7) =1019a(8) =25476a(9) =12738a(10) =6369a(11) =159226a(12) =79613a(13) =1990326a(14) =995163a(15) =24879076a(16) =12439538a(17) =6219769a(18) =155494226a(19) =77747113a(20) =1943677826a(21) =971838913a(22) =24295972826a(23) =12147986413