# A065054 (b-file synthesized from sequence entry) 1 0 2 1 3 2 4 6 5 10 6 19 7 38 8 75 9 133 10 247 11 453 12 843 13 1520 14 2751 15 5043 16 9317 17 17220 18 31221 19 57070 20 99737 21 181693 22 328254 23 589930