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| n | a(n) |
|---|---|
| 1 | 900 |
| 2 | 2304 |
| 3 | 4489 |
| 4 | 10680 |
| 5 | 23409 |
| 6 | 51188 |
| 7 | 104329 |
| 8 | 216395 |
| 9 | 430336 |
| 10 | 849760 |
| 11 | 1635841 |
| 12 | 3133971 |
| 13 | 5904900 |
| 14 | 11044072 |
| 15 | 20421361 |
| 16 | 37522132 |
| 17 | 68376361 |
| 18 | 123865010 |
| 19 | 222994489 |
| 20 | 399409023 |
| 21 | 711929124 |
| 22 | 1263316100 |
| 23 | 2233035025 |
| 24 | 3931870085 |
| 25 | 6900957184 |
[900,2304,4489,10680,23409,51188,104329,216395, 430336,849760,1635841,3133971,5904900,11044072, 20421361,37522132,68376361,123865010,222994489, 399409023,711929124,1263316100,2233035025, 3931870085,6900957184] |