# A229900 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 7 5 22 6 54 7 192 8 496 9 1722 10 4799 11 17013 12 48362 13 169458 14 498733 15 1776570 16 5331037 17 18608396 18 57109292 19 201213331 20 625146398 21 2176243724 22 6873338754 23 24052502138 24 76626395556 25 265774736523 26 856909651252 27 2979519037203 28 9675077715466 29 33455355338926 30 109591055905415