# A099851 (b-file synthesized from sequence entry) 1 1 2 3 3 16 4 57 5 112 6 160 7 272 8 404 9 20924 10 147153 11 274617 12 4409708 13 24881389 14 34850872 15 39808233 16 186610952 17 980830465 18 1777956414