# A043868 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 5 5 10 6 15 7 21 8 42 9 63 10 85 11 170 12 255 13 341 14 682 15 1023 16 1365 17 2730 18 4095 19 5461 20 10922 21 16383 22 21845 23 43690 24 65535 25 87381 26 174762 27 262143 28 349525 29 699050 30 1048575 31 1118481 32 1118482 33 1118483 34 1118488 35 1118489 36 1118491