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| n | a(n) |
|---|---|
| 1 | 264 |
| 2 | 488 |
| 3 | 936 |
| 4 | 1912 |
| 5 | 4008 |
| 6 | 8760 |
| 7 | 19560 |
| 8 | 44952 |
| 9 | 105128 |
| 10 | 250744 |
| 11 | 605928 |
| 12 | 1483288 |
| 13 | 3663912 |
| 14 | 9124728 |
| 15 | 22858344 |
| 16 | 57552408 |
| 17 | 145440680 |
| 18 | 368673400 |
| 19 | 936669672 |
| 20 | 2384161816 |
| 21 | 6076987176 |
| 22 | 15506905464 |
| 23 | 39603020136 |
| 24 | 101209873944 |
| 25 | 258785240744 |
[264,488,936,1912,4008,8760,19560,44952,105128, 250744,605928,1483288,3663912,9124728,22858344, 57552408,145440680,368673400,936669672,2384161816, 6076987176,15506905464,39603020136,101209873944, 258785240744] |