# A214467 (b-file synthesized from sequence entry) 1 1 2 7 3 15 4 21 5 21 6 27 7 35 8 35 9 56 10 70 11 84 12 105 13 105 14 105 15 120 16 168 17 189 18 189 19 189 20 210 21 210 22 216 23 280 24 280 25 315 26 336 27 378 28 405 29 420 30 512