# A069765 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 7 5 13 6 24 7 42 8 77 9 138 10 249 11 454 12 823 13 1493 14 2719 15 4969 16 9060 17 16588 18 30375 19 55672 20 102330 21 188334 22 346624 23 639280 24 1179742 25 2178907 26 4029060 27 7456271 28 13806301 29 25587417 30 47452133 31 88057540 32 163518793 33 303826088 34 564825654