# A049031 (b-file synthesized from sequence entry) 1 0 2 0 3 2 4 8 5 20 6 40 7 80 8 140 9 224 10 336 11 504 12 720 13 990 14 1320 15 1760 16 2288 17 2912 18 3640 19 4550 20 5600 21 6800 22 8160 23 9792 24 11628 25 13680 26 15960 27 18620 28 21560 29 24794 30 28336 31 32384 32 36800 33 41600 34 46800 35 52650 36 58968 37 65772 38 73080 39 81200 40 89900