# A276778 (b-file synthesized from sequence entry) 1 1 2 4 3 9 4 20 5 42 6 85 7 173 8 347 9 697 10 1395 11 2792 12 5587 13 11175 14 22352 15 44706 16 89414 17 178830 18 357661 19 715324 20 1430650 21 2861303 22 5722607 23 11445216 24 22890435 25 45780872 26 91561745 27 183123492 28 301029986 29 301029986