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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 5 |
| 3 | 7 |
| 4 | 13 |
| 5 | 16 |
| 6 | 22 |
| 7 | 30 |
| 8 | 56 |
| 9 | 78 |
| 10 | 80 |
| 11 | 90 |
| 12 | 194 |
| 13 | 316 |
| 14 | 1796 |
| 15 | 2004 |
| 16 | 3856 |
| 17 | 5226 |
| 18 | 6737 |
| 19 | 10841 |
| 20 | 43638 |
| 21 | 50467 |
| 22 | 85666 |
[4,5,7,13,16,22,30,56,78,80,90,194,316,1796,2004, 3856,5226,6737,10841,43638,50467,85666] |