# A291982 (b-file synthesized from sequence entry) 0 1 1 3 2 6 3 161 4 380 5 9251 6 68922 7 9718545 8 24721272 9 1140755269 10 14712346550 11 1678097074579 12 13104139232340 13 889926827467887 14 16319429252249970 15 10286621696853755681 16 27076409740571217392 17 2427916115944458451025 18 57728302956904672126062