# A228816 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 12 5 25 6 42 7 77 8 120 9 198 10 300 11 462 12 672 13 1001 14 1414 15 2025 16 2816 17 3927 18 5346 19 7315 20 9800 21 13167 22 17424 23 23046 24 30120 25 39375 26 50908 27 65772 28 84280 29 107822 30 136950 31 173724 32 218944 33 275517 34 344862 35 430850 36 535788 37 665149 38 822206 39 1014585 40 1247400