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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 30 |
| 3 | 144 |
| 4 | 474 |
| 5 | 1324 |
| 6 | 2934 |
| 7 | 5797 |
| 8 | 10614 |
| 9 | 17424 |
| 10 | 27480 |
| 11 | 41845 |
| 12 | 61602 |
| 13 | 85711 |
| 14 | 120120 |
| 15 | 159213 |
| 16 | 207798 |
| 17 | 269668 |
| 18 | 349272 |
| 19 | 434878 |
| 20 | 545496 |
| 21 | 661764 |
| 22 | 804582 |
| 23 | 973471 |
| 24 | 1174980 |
| 25 | 1374646 |
| 26 | 1631304 |
| 27 | 1908768 |
| 28 | 2218254 |
| 29 | 2560198 |
| 30 | 2976486 |
| 31 | 3378985 |
| 32 | 3887796 |
| 33 | 4405671 |
| 34 | 4995240 |
| 35 | 5617689 |
| 36 | 6322878 |
[7,30,144,474,1324,2934,5797,10614,17424,27480, 41845,61602,85711,120120,159213,207798,269668, 349272,434878,545496,661764,804582,973471,1174980, 1374646,1631304,1908768,2218254,2560198,2976486, 3378985,3887796,4405671,4995240,5617689,6322878] |