A083995 a(1) = 9, then the smallest number such that the forward as well as the reverse n-th partial concatenation is a prime for n>1. (Reverse concatenation is taken term-wise and not digit-wise).

9, 7, 1, 27, 3, 63, 191, 297, 207, 19, 3107, 147, 159, 5679, 4579, 2739, 2223, 8517, 8649, 2531, 1699, 3969, 797, 12883, 11013, 4811, 15657, 2719, 2231, 15391, 32711, 35931, 6861, 3927, 87, 6057, 2083, 19943, 13389, 35679, 1653, 37519, 13347, 21567