# A030957 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 26 5 134 6 804 7 5632 8 45058 9 405525 10 4055253 11 44607785 12 535293421 13 6958814485 14 97423402796 15 1461351041944 16 23381616671119 17 397487483409030 18 7154774701362549 19 135940719325888433 20 2718814386517768672