# A138777 (b-file synthesized from sequence entry) 2 1 3 3 4 6 5 10 6 15 7 21 8 1 9 28 10 6 11 36 12 21 13 45 14 56 15 55 16 126 17 66 18 252 19 1 20 78 21 462 22 9 23 91 24 792 25 45 26 105 27 1287 28 165 29 120 30 2002 31 495 32 136 33 3003 34 1287 35 1 36 153 37 4368 38 3003 39 12 40 171 41 6188 42 6435 43 78 44 190 45 8568 46 12870 47 364