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| n | a(n) |
|---|---|
| 1 | 141 |
| 2 | 1001 |
| 3 | 4621 |
| 4 | 15681 |
| 5 | 42821 |
| 6 | 99961 |
| 7 | 207621 |
| 8 | 394241 |
| 9 | 697501 |
| 10 | 1165641 |
| 11 | 1858781 |
| 12 | 2850241 |
| 13 | 4227861 |
| 14 | 6095321 |
| 15 | 8573461 |
| 16 | 11801601 |
| 17 | 15938861 |
| 18 | 21165481 |
| 19 | 27684141 |
| 20 | 35721281 |
| 21 | 45528421 |
| 22 | 57383481 |
| 23 | 71592101 |
| 24 | 88488961 |
| 25 | 108439101 |
| 26 | 131839241 |
[141,1001,4621,15681,42821,99961,207621,394241, 697501,1165641,1858781,2850241,4227861,6095321, 8573461,11801601,15938861,21165481,27684141, 35721281,45528421,57383481,71592101,88488961, 108439101,131839241] |