# A050264 (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 37 11 43 12 47 13 53 14 67 15 73 16 103 17 107 18 137 19 157 20 173 21 227 22 347 23 487 24 773