# A022492 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 10 5 28 6 100 7 421 8 2101 9 11953 10 76121 11 533780 12 4077565 13 33655662 14 298278708 15 2824175781 16 28446451346 17 303704165521 18 3425895062137 19 40716009508038 20 508528878864884