# A271970 (b-file synthesized from sequence entry) 1 1 2 0 3 1 4 0 5 1 6 3 7 3 8 5 9 8 10 12 11 20 12 31 13 48 14 76 15 119 16 187 17 294 18 461 19 724 20 1137 21 1785 22 2803 23 4401 24 6910 25 10850 26 17036 27 26749 28 42000 29 65946 30 103545 31 162581 32 255276 33 400821 34 629348 35 988169 36 1551571 37 2436195 38 3825185 39 6006104 40 9430468 41 14807224 42 23249523 43 36505176