# A182411 (b-file synthesized from sequence entry) 0 1 1 2 2 2 3 6 4 4 5 6 6 20 7 10 8 12 9 20 10 70 11 28 12 28 13 40 14 70 15 252 16 84 17 72 18 90 19 140 20 252 21 924 22 264 23 198 24 220 25 308 26 504 27 924 28 3432 29 858 30 572 31 572 32 728 33 1092 34 1848 35 3432 36 12870 37 2860 38 1716 39 1560 40 1820 41 2520 42 3960 43 6864 44 12870 45 48620 46 9724 47 5304 48 4420 49 4760 50 6120 51 8976