# A097714 (b-file synthesized from sequence entry) 1 60 2 100 3 140 4 220 5 340 6 540 7 900 8 1500 9 2500 10 4140 11 6900 12 11500 13 19140 14 31900 15 53140 16 88540 17 147540 18 245900 19 409820 20 683020 21 1138340 22 1897220 23 3162020 24 5270020 25 8783340 26 14638900 27 24398140 28 40663540 29 67772540 30 112954220 31 188257020