# A165580 (b-file synthesized from sequence entry) 1 3 2 7 3 23 4 31 5 47 6 71 7 79 8 151 9 167 10 191 11 199 12 239 13 263 14 271 15 311 16 359 17 383 18 431 19 439 20 479 21 503 22 599 23 647 24 719 25 743 26 751 27 839 28 863 29 887 30 911 31 919 32 983 33 991 34 1031 35 1039 36 1151 37 1223 38 1231 39 1279 40 1319 41 1399 42 1439 43 1471 44 1487 45 1511 46 1559 47 1583 48 1759