# A019144 (b-file synthesized from sequence entry) 3 0 4 2 5 2 6 7 7 13 8 25 9 42 10 81 11 193 12 454 13 1041 14 2502 15 6242 16 13807 17 35326 18 87295 19 209812 20 548575 21 1343566 22 3489028 23 8907422 24 22985251 25 59673055 26 154469560 27 402551592 28 1046972388 29 2729730656 30 7118291151 31 18566002813