# A026914 (b-file synthesized from sequence entry) 0 1 1 13 2 44 3 90 4 198 5 370 6 758 7 1403 8 2824 9 5256 10 10530 11 19749 12 39516 13 74628 14 149274 15 283551 16 567120 17 1082440 18 2164898 19 4148594 20 8297206 21 15953598 22 31907214 23 61526960 24 123053938 25 237876562 26 475753142 27 921678867 28 1843357752