# A146680 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 9 9 20 10 33 11 56 12 137 13 404 14 1209 15 4087 16 15733 17 60343 18 254309 19 1153606 20 5642466 21 31006709 22 182836767 23 1183007758 24 8378875432 25 64857203324