# A148642 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 6 4 22 5 64 6 227 7 776 8 2854 9 10455 10 39319 11 149787 12 579560 13 2257337 14 8887284 15 35287573 16 141013188 17 566875691 18 2292206719 19 9315490488 20 38020945055 21 155804714945 22 640940906466 23 2645526853223 24 10952645997032 25 45477822976693 26 189341279059823 27 790216314543537 28 3305546258574085