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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 6 |
| 2 | 42 |
| 3 | 258 |
| 4 | 1044 |
| 5 | 3150 |
| 6 | 7806 |
| 7 | 16842 |
| 8 | 32808 |
| 9 | 59094 |
| 10 | 100050 |
| 11 | 161106 |
| 12 | 248892 |
| 13 | 371358 |
| 14 | 537894 |
| 15 | 759450 |
| 16 | 1048656 |
| 17 | 1419942 |
| 18 | 1889658 |
| 19 | 2476194 |
| 20 | 3200100 |
| 21 | 4084206 |
| 22 | 5153742 |
| 23 | 6436458 |
| 24 | 7962744 |
| 25 | 9765750 |
| 26 | 11881506 |
| 27 | 14349042 |
| 28 | 17210508 |
| 29 | 20511294 |
[0,6,42,258,1044,3150,7806,16842,32808,59094, 100050,161106,248892,371358,537894,759450,1048656, 1419942,1889658,2476194,3200100,4084206,5153742, 6436458,7962744,9765750,11881506,14349042, 17210508,20511294] |