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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 10 |
| 3 | 238850 |
| 4 | 315410 |
| 5 | 927070 |
| 6 | 2525870 |
| 7 | 2828270 |
| 8 | 3993070 |
| 9 | 4794520 |
| 10 | 5617160 |
| 11 | 6173870 |
| 12 | 6859310 |
| 13 | 8146100 |
| 14 | 8294290 |
| 15 | 9267220 |
| 16 | 10053410 |
| 17 | 10515340 |
| 18 | 12720460 |
| 19 | 15074770 |
| 20 | 16755190 |
| 21 | 16788580 |
| 22 | 17525470 |
| 23 | 21740120 |
| 24 | 26657060 |
| 25 | 29633510 |
[2,10,238850,315410,927070,2525870,2828270, 3993070,4794520,5617160,6173870,6859310,8146100, 8294290,9267220,10053410,10515340,12720460, 15074770,16755190,16788580,17525470,21740120, 26657060,29633510] |