# A374749 (b-file synthesized from sequence entry) 1 0 2 9 3 18 4 108 5 279 6 1260 7 3780 8 15129 9 49158 10 185328 11 627759 12 2295720 13 7945560 14 28607049 15 100117098 16 357580548 17 1258634439 18 4476859380 19 15804569340 20 56096303769 21 198337427838 22 703204161768 23 2488241012319 24 8817078468240 25 31211247579120 26 110564953793289