# A291870 (b-file synthesized from sequence entry) 1 1 2 3 3 4 4 7 5 10 6 31 7 39 8 70 9 84 10 135 11 154 12 279 13 282 14 522 15 660 16 765 17 1153 18 1980 19 5670 20 8064 21 20823 22 34290 23 79711 24 109759