# A181531 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 0 4 2 5 1 6 3 7 2 8 5 9 4 10 8 11 7 12 13 13 12 14 20 15 20 16 31 17 32 18 47 19 50 20 71 21 77 22 105 23 116 24 155 25 173 26 225 27 254 28 325 29 369 30 465 31 530 32 660 33 755 34 929 35 1066 36 1300 37 1493 38 1805 39 2076 40 2493 41 2867 42 3421 43 3934 44 4669 45 5368 46 6337 47 7282 48 8560 49 9828 50 11505 51 13198 52 15394 53 17641 54 20507 55 23475