# A069681 (b-file synthesized from sequence entry) 1 2 2 3 3 5 4 7 5 11 6 13 7 17 8 19 9 23 10 29 11 31 12 37 13 41 14 43 15 47 16 53 17 59 18 61 19 67 20 71 21 73 22 79 23 83 24 89 25 97 26 163 27 167 28 263 29 269 30 367 31 461 32 463 33 467 34 563 35 569 36 661 37 761 38 769 39 863 40 967 41 1663 42 1667 43 1669 44 2663 45 4663 46 5669 47 6661 48 7669 49 8663 50 8669 51 9661 52 16661 53 26669 54 46663 55 56663