# A068604 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 3 5 6 6 9 7 16 8 29 9 51 10 84 11 138 12 227 13 370 14 603 15 980 16 1589 17 2576 18 4172 19 6756 20 10936 21 17700 22 28646 23 46357 24 75013 25 121381 26 196405