# A171887 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 9 5 20 6 50 7 147 8 269 9 992 10 1000 11 4297 12 76468 13 97314 14 445519 15 1315337 16 2594742 17 3888902 18 91859035 19 92411466 20 1180624310 21 4501485474 22 11288114818 23 23434425843