# A343331 (b-file synthesized from sequence entry) 0 1 1 1 2 10 3 110 4 1145 5 12045 6 126070 7 1319570 8 13798710 9 144217910 10 1506406702 11 15726571002 12 164096557935 13 1711386871635 14 17839701265570 15 185876723016390 16 1935830424374840 17 20152131324766520 18 209696974024339610 19 2181155691766631710 20 22678274833738085501 21 235704268837407670401