# A148454 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 17 5 57 6 205 7 745 8 2875 9 11305 10 45332 11 186380 12 774303 13 3267037 14 13949978 15 60078464 16 261420213 17 1145680231 18 5056693164 19 22468775276 20 100367233789 21 450802933329 22 2034271914025 23 9219038987323 24 41952247315081 25 191591933975581 26 878015079137772 27 4036487462078620 28 18610889183478567