# A201631 (b-file synthesized from sequence entry) 1 1 2 3 3 6 4 13 5 30 6 70 7 167 8 405 9 992 10 2450 11 6090 12 15214 13 38165 14 96069 15 242530 16 613811 17 1556856 18 3956316 19 10070871 20 25674210 21 65541142 22 167517654 23 428635032 24 1097874434 25 2814611701 26 7221917871 27 18544968768 28 47655572191 29 122544150258 30 315313433594 31 811792614547