# A364432 (b-file synthesized from sequence entry) 0 1 1 3 2 18 3 162 4 1728 5 20169 6 249318 7 3207600 8 42500700 9 576012060 10 7947785448 11 111269613006 12 1576658688480 13 22568473199358 14 325855352769588 15 4740157737123696 16 69405108247439676 17 1022070746845708740 18 15127922880893671704 19 224931239520535651464