# A046171 (b-file synthesized from sequence entry) 1 1 2 2 3 5 4 13 5 36 6 98 7 272 8 740 9 2034 10 5513 11 15037 12 40617 13 110188 14 296806 15 802075 16 2155667 17 5808335 18 15582342 19 41889578 20 112212146 21 301100754 22 805570061 23 2158326727 24 5768299665 25 15435169364 26 41214098278 27 110164686454