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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 13 |
| 3 | 59 |
| 4 | 281 |
| 5 | 1355 |
| 6 | 6613 |
| 7 | 32467 |
| 8 | 160177 |
| 9 | 792707 |
| 10 | 3932477 |
| 11 | 19541707 |
| 12 | 97236105 |
| 13 | 484307099 |
| 14 | 2414051237 |
| 15 | 12040104643 |
| 16 | 60078296865 |
| 17 | 299892993619 |
| 18 | 1497421655949 |
| 19 | 7478693480123 |
| 20 | 37358671384825 |
| 21 | 186648931452395 |
| 22 | 932643177692789 |
| 23 | 4660703200810867 |
| 24 | 23292989642961809 |
| 25 | 116420735945141411 |
[1,3,13,59,281,1355,6613,32467,160177,792707, 3932477,19541707,97236105,484307099,2414051237, 12040104643,60078296865,299892993619, 1497421655949,7478693480123,37358671384825, 186648931452395,932643177692789,4660703200810867, 23292989642961809,116420735945141411] |