# A147400 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 3 7 7 8 15 9 29 10 107 11 505 12 2403 13 11235 14 68883 15 550857 16 5140463 17 52360741 18 625116575 19 9135765233 20 158905603757 21 3203687852735 22 75422308943617