A071392 Reverse of smallest prime factor of n = largest prime factor of n+1; a(1)=1.

1, 73, 247, 2573, 2627, 2839, 3379, 5609, 7501, 9113, 9827, 10081, 10877, 11531, 12851, 13949, 14909, 16279, 16367, 17323, 18833, 22151, 26039, 26753, 29749, 31589, 31807, 34099, 35039, 35711, 36517, 36991, 39049, 41353, 43289, 43679