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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 10 |
| 3 | 100 |
| 4 | 460 |
| 5 | 1460 |
| 6 | 3710 |
| 7 | 8120 |
| 8 | 15960 |
| 9 | 28920 |
| 10 | 49170 |
| 11 | 79420 |
| 12 | 122980 |
| 13 | 183820 |
| 14 | 266630 |
| 15 | 376880 |
| 16 | 520880 |
| 17 | 705840 |
| 18 | 939930 |
| 19 | 1232340 |
| 20 | 1593340 |
| 21 | 2034340 |
| 22 | 2567950 |
| 23 | 3208040 |
| 24 | 3969800 |
| 25 | 4869800 |
| 26 | 5926050 |
| 27 | 7158060 |
| 28 | 8586900 |
| 29 | 10235260 |
| 30 | 12127510 |
| 31 | 14289760 |
| 32 | 16749920 |
| 33 | 19537760 |
| 34 | 22684970 |
| 35 | 26225220 |
| 36 | 30194220 |
| 37 | 34629780 |
| 38 | 39571870 |
| 39 | 45062680 |
| 40 | 51146680 |
[0,10,100,460,1460,3710,8120,15960,28920,49170, 79420,122980,183820,266630,376880,520880,705840, 939930,1232340,1593340,2034340,2567950,3208040, 3969800,4869800,5926050,7158060,8586900,10235260, 12127510,14289760,16749920,19537760,22684970, 26225220,30194220,34629780,39571870,45062680, 51146680] |