# A047773 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 1 5 0 6 0 7 1 8 1 9 0 10 2 11 3 12 0 13 3 14 5 15 0 16 7 17 11 18 0 19 12 20 23 21 0 22 30 23 55 24 0 25 55 26 114 27 0 28 143 29 272 30 0 31 273 32 588 33 0 34 728 35 1428 36 0 37 1428 38 3156 39 0 40 3876 41 7750 42 0 43 7752 44 17427 45 0 46 21318 47 43263 48 0 49 43263 50 98516 51 0 52 120175 53 246672 54 0 55 246675 56 567281 57 0