# A177815 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 2 5 1 6 3 7 1 8 4 9 1 10 5 11 1 12 6 13 1 14 7 15 1 16 8 17 1 18 1 19 9 20 9 21 1 22 10 23 45 24 1 25 11 26 165 27 1 28 12 29 495 30 1 31 13 32 1287 33 1 34 14 35 3003 36 1 37 15 38 6435 39 1 40 16 41 12870 42 1 43 17 44 24310 45 1 46 18 47 43758 48 1 49 19 50 75582 51 1 52 20 53 125970