# A277246 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 31 4 109 5 339 6 1039 7 2957 8 8135 9 21280 10 53688 11 130174 12 305539 13 693598 14 1528901 15 3274785 16 6832548 17 13900570 18 27626151 19 53692474 20 102193925 21 190678199 22 349172204 23 628122125 24 1111050987 25 1934048642 26 3315905471 27 5603441375 28 9339723645 29 15364504830