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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 7 |
| 2 | 97 |
| 3 | 525 |
| 4 | 1845 |
| 5 | 5032 |
| 6 | 11602 |
| 7 | 23730 |
| 8 | 44370 |
| 9 | 77378 |
| 10 | 127628 |
| 11 | 201135 |
| 12 | 305175 |
| 13 | 448403 |
| 14 | 640973 |
| 15 | 894660 |
| 16 | 1222981 |
| 17 | 1641308 |
| 18 | 2166998 |
| 19 | 2819506 |
| 20 | 3620506 |
| 21 | 4594013 |
| 22 | 5766503 |
| 23 | 7167031 |
| 24 | 8827351 |
| 25 | 10782039 |
| 26 | 13068609 |
| 27 | 15727636 |
| 28 | 18802876 |
[0,7,97,525,1845,5032,11602,23730,44370,77378, 127628,201135,305175,448403,640973,894660,1222981, 1641308,2166998,2819506,3620506,4594013,5766503, 7167031,8827351,10782039,13068609,15727636, 18802876] |