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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 10 |
| 4 | 14 |
| 5 | 26 |
| 6 | 50 |
| 7 | 74 |
| 8 | 98 |
| 9 | 122 |
| 10 | 242 |
| 11 | 362 |
| 12 | 482 |
| 13 | 722 |
| 14 | 1442 |
| 15 | 1682 |
| 16 | 2522 |
| 17 | 3362 |
| 18 | 5042 |
| 19 | 10082 |
| 20 | 15122 |
| 21 | 20162 |
| 22 | 30242 |
| 23 | 40322 |
| 24 | 50402 |
| 25 | 55442 |
| 26 | 90722 |
| 27 | 100802 |
| 28 | 110882 |
| 29 | 166322 |
| 30 | 221762 |
| 31 | 332642 |
| 32 | 443522 |
[4,6,10,14,26,50,74,98,122,242,362,482,722,1442, 1682,2522,3362,5042,10082,15122,20162,30242,40322, 50402,55442,90722,100802,110882,166322,221762, 332642,443522] |