# A007658 (b-file synthesized from sequence entry) 1 3 2 5 3 7 4 13 5 23 6 43 7 281 8 359 9 487 10 577 11 1579 12 1663 13 1741 14 3191 15 9209 16 11257 17 12743 18 13093 19 17027 20 26633 21 104243 22 134227 23 152287 24 700897 25 1205459 26 1896463 27 2533963 28 2674381