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| n | a(n) |
|---|---|
| 1 | 20 |
| 2 | 40 |
| 3 | 80 |
| 4 | 100 |
| 5 | 140 |
| 6 | 160 |
| 7 | 200 |
| 8 | 220 |
| 9 | 260 |
| 10 | 280 |
| 11 | 320 |
| 12 | 340 |
| 13 | 380 |
| 14 | 400 |
| 15 | 440 |
| 16 | 460 |
| 17 | 500 |
| 18 | 520 |
| 19 | 560 |
| 20 | 580 |
| 21 | 620 |
| 22 | 640 |
| 23 | 680 |
| 24 | 700 |
| 25 | 740 |
| 26 | 760 |
| 27 | 800 |
| 28 | 820 |
| 29 | 860 |
| 30 | 880 |
| 31 | 920 |
| 32 | 940 |
| 33 | 980 |
| 34 | 1000 |
| 35 | 1040 |
| 36 | 1060 |
| 37 | 1100 |
| 38 | 1120 |
| 39 | 1160 |
| 40 | 1180 |
| 41 | 1220 |
| 42 | 1240 |
| 43 | 1280 |
| 44 | 1300 |
| 45 | 1340 |
| 46 | 1360 |
| 47 | 1400 |
| 48 | 1420 |
| 49 | 1460 |
[20,40,80,100,140,160,200,220,260,280,320,340,380, 400,440,460,500,520,560,580,620,640,680,700,740, 760,800,820,860,880,920,940,980,1000,1040,1060, 1100,1120,1160,1180,1220,1240,1280,1300,1340,1360, 1400,1420,1460] |