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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 80 |
| 4 | 1742 |
| 5 | 51842 |
| 6 | 1902589 |
| 7 | 82219592 |
| 8 | 4071164749 |
| 9 | 226803165574 |
| 10 | 14029472009781 |
| 11 | 953926536359084 |
| 12 | 70723894649169937 |
| 13 | 5679305945331227594 |
| 14 | 491179287055641264989 |
| 15 | 45527108214667404725616 |
| 16 | 4503148842172835722939285 |
| 17 | 473502491643614888369261116 |
| 18 | 52748299277043902326373361722 |
| 19 | 6206479798643382507763241117360 |
| 20 | 769187266152748793100664986340382 |
| 21 | 100156538984193022704291755068539370 |
[1,2,7,80,1742,51842,1902589,82219592,4071164749, 226803165574,14029472009781,953926536359084, 70723894649169937,5679305945331227594, 491179287055641264989,45527108214667404725616, 4503148842172835722939285, 473502491643614888369261116, 52748299277043902326373361722, 6206479798643382507763241117360, 769187266152748793100664986340382, 100156538984193022704291755068539370] |