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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 41 |
| 4 | 53 |
| 5 | 258 |
| 6 | 328 |
| 7 | 1523 |
| 8 | 1931 |
| 9 | 8896 |
| 10 | 11274 |
| 11 | 51869 |
| 12 | 65729 |
| 13 | 302334 |
| 14 | 383116 |
| 15 | 1762151 |
| 16 | 2232983 |
| 17 | 10270588 |
| 18 | 13014798 |
| 19 | 59861393 |
| 20 | 75855821 |
| 21 | 348897786 |
| 22 | 442120144 |
| 23 | 2033525339 |
| 24 | 2576865059 |
| 25 | 11852254264 |
| 26 | 15019070226 |
| 27 | 69080000261 |
| 28 | 87537556313 |
| 29 | 402627747318 |
| 30 | 510206267668 |
[4,6,41,53,258,328,1523,1931,8896,11274,51869, 65729,302334,383116,1762151,2232983,10270588, 13014798,59861393,75855821,348897786,442120144, 2033525339,2576865059,11852254264,15019070226, 69080000261,87537556313,402627747318,510206267668] |