Trajectory of 3 under map n->49n+1 if n odd, n->n/2 if n even.

Terms

a(0) =3a(1) =148a(2) =74a(3) =37a(4) =1814a(5) =907a(6) =44444a(7) =22222a(8) =11111a(9) =544440a(10) =272220a(11) =136110a(12) =68055a(13) =3334696a(14) =1667348a(15) =833674a(16) =416837a(17) =20425014a(18) =10212507a(19) =500412844a(20) =250206422a(21) =125103211a(22) =6130057340a(23) =3065028670a(24) =1532514335