# A148635 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 6 4 22 5 61 6 221 7 715 8 2631 9 9410 10 35256 11 133053 12 509705 13 1985164 14 7789874 15 30950573 16 124019573 17 500123818 18 2037158956 19 8323345250 20 34325148556 21 141934974210 22 590948181102 23 2469466634992 24 10364625848330 25 43695896253794 26 184742552014020 27 784488681432788 28 3339338822434850