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| n | a(n) |
|---|---|
| 0 | 15 |
| 1 | 31 |
| 2 | 77 |
| 3 | 108 |
| 4 | 1589 |
| 5 | 1697 |
| 6 | 4983 |
| 7 | 11663 |
| 8 | 354873 |
| 9 | 721409 |
| 10 | 1797691 |
| 11 | 2519100 |
| 12 | 37065091 |
| 13 | 39584191 |
| 14 | 116233473 |
| 15 | 272051137 |
| 16 | 8277767583 |
| 17 | 16827586303 |
| 18 | 41932940189 |
| 19 | 58760526492 |
| 20 | 864580311077 |
| 21 | 923340837569 |
| 22 | 2711261986215 |
| 23 | 6345864809999 |
| 24 | 193087206286185 |
[15,31,77,108,1589,1697,4983,11663,354873,721409, 1797691,2519100,37065091,39584191,116233473, 272051137,8277767583,16827586303,41932940189, 58760526492,864580311077,923340837569, 2711261986215,6345864809999,193087206286185] |