# A375362 (b-file synthesized from sequence entry) 0 1 1 0 2 4 3 6 4 20 5 49 6 132 7 344 8 908 9 2384 10 6273 11 16492 12 43372 13 114050 14 299916 15 788673 16 2073944 17 5453760 18 14341528 19 37713312 20 99173121 21 260791400 22 685792228 23 1803399102 24 4742323108 25 12470688497 26 32793647356 27 86236081272 28 226771411940 29 596331286320