# A037733 (b-file synthesized from sequence entry) 1 2 2 15 3 105 4 738 5 5168 6 36177 7 253239 8 1772676 9 12408734 10 86861139 11 608027973 12 4256195814 13 29793370700 14 208553594901 15 1459875164307 16 10219126150152 17 71533883051066 18 500737181357463 19 3505160269502241