# A217482 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 0 4 4 5 20 6 84 7 220 8 560 9 1140 10 2300 11 4060 12 7140 13 11480 14 18424 15 27720 16 41664 17 59640 18 85320 19 117480 20 161700 21 215820 22 287980 23 374660 24 487344 25 620620 26 790244 27 988260 28 1235780 29 1521520 30 1873200 31 2275280 32 2763520 33 3317040 34 3981264 35 4728720 36 5616324 37 6608580