# A000696 (b-file synthesized from sequence entry) 1 1 2 7 3 31 4 37 5 109 6 121 7 127 8 133 9 151 10 157 11 403 12 421 13 511 14 529 15 631 16 637 17 661 18 679 19 1579 20 1621 21 1633 22 1969 23 1981 24 2017 25 2041 26 2047 27 2053 28 2071 29 2077 30 2143 31 2149 32 2167 33 2173 34 2401 35 2527 36 2557 37 2677 38 6493 39 6559 40 6643 41 6661 42 6703 43 6733 44 6871