# A115138 (b-file synthesized from sequence entry) 0 1 1 -1 2 1 3 15 4 113 5 783 6 5361 7 36879 8 255985 9 1794063 10 12689393 11 90505231 12 650379249 13 4705157135 14 34244198385 15 250572963855 16 1842382110705 17 13605619630095 18 100872203796465 19 750556607938575 20 5602962592235505 21 41952165966643215 22 314983352736153585