A033980 Trajectory of 1 under map n->49n+1 if n odd, n->n/2 if n even

1, 50, 25, 1226, 613, 30038, 15019, 735932, 367966, 183983, 9015168, 4507584, 2253792, 1126896, 563448, 281724, 140862, 70431, 3451120, 1725560, 862780, 431390, 215695, 10569056, 5284528, 2642264