# A117688 (b-file synthesized from sequence entry) 0 0 1 1 2 27 3 216 4 1000 5 27000 6 216000 7 287496 8 884736 9 970299 10 1000000 11 1860867 12 2146689 13 3581577 14 3796416 15 4019679 16 5000211 17 6128487 18 6434856 19 6751269 20 7414875 21 7762392 22 10077696 23 14348907 24 15438249 25 16581375 26 21717639 27 22425768