# A149346 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 12 4 42 5 149 6 568 7 2172 8 8578 9 34181 10 139057 11 569719 12 2364946 13 9881270 14 41674337 15 176735488 16 754733091 17 3238354312 18 13970248201 19 60513360263 20 263262526696 21 1149346431161 22 5035888179481 23 22132171128821 24 97564507265020 25 431236737233659 26 1911053967488337 27 8488822597541547