# A148776 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 8 4 23 5 70 6 231 7 747 8 2519 9 8596 10 30022 11 104652 12 372171 13 1327738 14 4795592 15 17329563 16 63304887 17 231602170 18 853989048 19 3150826452 20 11704071278 21 43519371188 22 162687329027 23 608474865891 24 2286424185195 25 8597775368680 26 32455844916962 27 122568464638204 28 464459733245576 29 1760989548140200