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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 29 |
| 3 | 117 |
| 4 | 469 |
| 5 | 1877 |
| 6 | 7509 |
| 7 | 30037 |
| 8 | 120149 |
| 9 | 480597 |
| 10 | 1922389 |
| 11 | 7689557 |
| 12 | 30758229 |
| 13 | 123032917 |
| 14 | 492131669 |
| 15 | 1968526677 |
| 16 | 7874106709 |
| 17 | 31496426837 |
| 18 | 125985707349 |
| 19 | 503942829397 |
| 20 | 2015771317589 |
| 21 | 8063085270357 |
| 22 | 32252341081429 |
| 23 | 129009364325717 |
| 24 | 516037457302869 |
[7,29,117,469,1877,7509,30037,120149,480597, 1922389,7689557,30758229,123032917,492131669, 1968526677,7874106709,31496426837,125985707349, 503942829397,2015771317589,8063085270357, 32252341081429,129009364325717,516037457302869] |