# A047765 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 1 5 0 6 2 7 0 8 2 9 0 10 7 11 0 12 12 13 0 14 29 15 0 16 55 17 0 18 143 19 0 20 271 21 0 22 728 23 0 24 1428 25 0 26 3873 27 0 28 7752 29 0 30 21318 31 0 32 43256 33 0 34 120175 35 0 36 246675 37 0 38 690678 39 0 40 1430715 41 0 42 4032015 43 0 44 8414610 45 0 46 23841480 47 0 48 50067108 49 0 50 142498637 51 0 52 300830572