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| n | a(n) |
|---|---|
| 1 | 77 |
| 2 | 189 |
| 3 | 539 |
| 4 | 1475 |
| 5 | 4075 |
| 6 | 11573 |
| 7 | 32627 |
| 8 | 91821 |
| 9 | 259851 |
| 10 | 734851 |
| 11 | 2075941 |
| 12 | 5870163 |
| 13 | 16600435 |
| 14 | 46931203 |
| 15 | 132697609 |
| 16 | 375223671 |
| 17 | 1060938473 |
| 18 | 2999820909 |
| 19 | 8482201517 |
| 20 | 23983752731 |
| 21 | 67814920687 |
| 22 | 191749978139 |
| 23 | 542181596411 |
| 24 | 1533041341641 |
[77,189,539,1475,4075,11573,32627,91821,259851, 734851,2075941,5870163,16600435,46931203, 132697609,375223671,1060938473,2999820909, 8482201517,23983752731,67814920687,191749978139, 542181596411,1533041341641] |