# A148108 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 10 5 27 6 84 7 270 8 904 9 3149 10 11221 11 41052 12 153615 13 585423 14 2266898 15 8899882 16 35367261 17 142063183 18 576212939 19 2357624559 20 9722575246 21 40382761328 22 168823553558 23 709990487405 24 3002235850977 25 12759119302740 26 54477236422389 27 233603326611414 28 1005725216037108 29 4346070952878284