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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 743 |
| 3 | 6732 |
| 4 | 30046 |
| 5 | 94100 |
| 6 | 237429 |
| 7 | 517468 |
| 8 | 1014332 |
| 9 | 1834596 |
| 10 | 3115075 |
| 11 | 5026604 |
| 12 | 7777818 |
| 13 | 11618932 |
| 14 | 16845521 |
| 15 | 23802300 |
| 16 | 32886904 |
| 17 | 44553668 |
| 18 | 59317407 |
| 19 | 77757196 |
| 20 | 100520150 |
| 21 | 128325204 |
| 22 | 161966893 |
| 23 | 202319132 |
| 24 | 250338996 |
| 25 | 307070500 |
| 26 | 373648379 |
[0,4,743,6732,30046,94100,237429,517468,1014332, 1834596,3115075,5026604,7777818,11618932,16845521, 23802300,32886904,44553668,59317407,77757196, 100520150,128325204,161966893,202319132,250338996, 307070500,373648379] |