# A051891 (b-file synthesized from sequence entry) 1 2 2 3 3 6 4 10 5 15 6 51 7 175 8 261 9 285 10 286 11 331 12 546 13 745 14 1135 15 1171 16 1275 17 1330 18 1365 19 1366 20 2025 21 2640 22 3180 23 3436 24 3780 25 4116 26 4861 27 5860 28 5890 29 6036 30 6670 31 8646 32 8961 33 8980 34 9715 35 9945 36 10116 37 10180 38 15771 39 16590 40 16876 41 19326 42 20215 43 20266 44 21451