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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 5 |
| 3 | 9 |
| 4 | 77 |
| 5 | 86 |
| 6 | 163 |
| 7 | 738 |
| 8 | 26731 |
| 9 | 107662 |
| 10 | 134393 |
| 11 | 242055 |
| 12 | 2070833 |
| 13 | 2312888 |
| 14 | 4383721 |
| 15 | 19847772 |
| 16 | 718903513 |
| 17 | 2895461824 |
| 18 | 3614365337 |
| 19 | 6509827161 |
| 20 | 55692982625 |
| 21 | 62202809786 |
| 22 | 117895792411 |
| 23 | 533785979430 |
| 24 | 19334191051891 |
| 25 | 77870550186994 |
| 26 | 97204741238885 |
[1,4,5,9,77,86,163,738,26731,107662,134393,242055, 2070833,2312888,4383721,19847772,718903513, 2895461824,3614365337,6509827161,55692982625, 62202809786,117895792411,533785979430, 19334191051891,77870550186994,97204741238885] |