# A355397 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 51 4 350 5 2799 6 25373 7 255854 8 2831177 9 34023919 10 440414146 11 6099346455 12 89873849705 13 1402403637418 14 23081230257449 15 399284248276827 16 7238080522101270 17 137125745341692863 18 2708536196071195365 19 55660194042713099510 20 1187724805063462045289