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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 13 |
| 3 | 24 |
| 4 | 76 |
| 5 | 169 |
| 6 | 343 |
| 7 | 741 |
| 8 | 1618 |
| 9 | 3451 |
| 10 | 7390 |
| 11 | 15924 |
| 12 | 34201 |
| 13 | 73387 |
| 14 | 157681 |
| 15 | 338754 |
| 16 | 727483 |
| 17 | 1562542 |
| 18 | 3356380 |
| 19 | 7209057 |
| 20 | 15484111 |
| 21 | 33258613 |
| 22 | 71436250 |
| 23 | 153437331 |
| 24 | 329568094 |
| 25 | 707879620 |
| 26 | 1520453233 |
| 27 | 3265779603 |
| 28 | 7014566209 |
| 29 | 15066579706 |
[13,13,24,76,169,343,741,1618,3451,7390,15924, 34201,73387,157681,338754,727483,1562542,3356380, 7209057,15484111,33258613,71436250,153437331, 329568094,707879620,1520453233,3265779603, 7014566209,15066579706] |