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| n | a(n) |
|---|---|
| 0 | 7 |
| 1 | 77 |
| 2 | 490 |
| 3 | 2436 |
| 4 | 10143 |
| 5 | 37338 |
| 6 | 124754 |
| 7 | 386155 |
| 8 | 1121505 |
| 9 | 3087735 |
| 10 | 8118264 |
| 11 | 20506255 |
| 12 | 49995925 |
| 13 | 118114304 |
| 14 | 271248950 |
| 15 | 607163746 |
| 16 | 1327710076 |
| 17 | 2841940500 |
| 18 | 5964539504 |
| 19 | 12292341831 |
| 20 | 24908858009 |
| 21 | 49686288421 |
| 22 | 97662728555 |
| 23 | 189334822579 |
| 24 | 362326859895 |
| 25 | 684957390936 |
| 26 | 1280011042268 |
| 27 | 2366022741845 |
| 28 | 4328363658647 |
| 29 | 7840656226137 |
[7,77,490,2436,10143,37338,124754,386155,1121505, 3087735,8118264,20506255,49995925,118114304, 271248950,607163746,1327710076,2841940500, 5964539504,12292341831,24908858009,49686288421, 97662728555,189334822579,362326859895, 684957390936,1280011042268,2366022741845, 4328363658647,7840656226137] |