# A107316 (b-file synthesized from sequence entry) 1 2 2 3 3 6 4 13 5 29 6 67 7 156 8 372 9 900 10 2202 11 5443 12 13562 13 34031 14 85900 15 217934 16 555381 17 1420879 18 3647776 19 9393805 20 24258259 21 62800749 22 162950583 23 423687106 24 1103713422 25 2880195973 26 7528061901 27 19705490392 28 51652038010 29 135563251625