A118837 Start with 1 and repeatedly place the first digit at the end of the number and add 4.

1, 5, 9, 13, 35, 57, 79, 101, 15, 55, 59, 99, 103, 35, 57, 79, 101, 15, 55, 59, 99, 103, 35, 57, 79, 101, 15, 55, 59, 99, 103, 35, 57, 79, 101, 15, 55, 59, 99, 103, 35, 57, 79, 101, 15, 55, 59, 99, 103, 35, 57, 79, 101, 15, 55, 59, 99, 103, 35, 57, 79, 101, 15, 55, 59, 99, 103