# A210567 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 10 5 23 6 63 7 155 8 448 9 1152 10 3452 11 9158 12 28178 13 76539 14 240370 15 665129 16 2123439 17 5964691 18 19302316 19 54898416 20 179696557