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| n | a(n) |
|---|---|
| 1 | 901 |
| 2 | 1005 |
| 3 | 2106 |
| 4 | 4298 |
| 5 | 11543 |
| 6 | 28363 |
| 7 | 64640 |
| 8 | 181608 |
| 9 | 459594 |
| 10 | 1077260 |
| 11 | 3086344 |
| 12 | 7919676 |
| 13 | 18750107 |
| 14 | 54232060 |
| 15 | 140107552 |
| 16 | 333274007 |
| 17 | 968659780 |
| 18 | 2511122087 |
| 19 | 5987505072 |
| 20 | 17447315392 |
| 21 | 45310860821 |
| 22 | 108172897186 |
| 23 | 315636791803 |
[901,1005,2106,4298,11543,28363,64640,181608, 459594,1077260,3086344,7919676,18750107,54232060, 140107552,333274007,968659780,2511122087, 5987505072,17447315392,45310860821,108172897186, 315636791803] |