# A117416 (b-file synthesized from sequence entry) 0 4 1 4 2 9 3 26 4 82 5 247 6 731 7 2186 8 6559 9 19679 10 59047 11 177149 12 531439 13 1594322 14 4782979 15 14348905 16 43046722 17 129140159 18 387420493 19 1162261465 20 3486784399 21 10460353201 22 31381059597 23 94143178823 24 282429536489 25 847288609441