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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 49 |
| 3 | 53 |
| 4 | 115 |
| 5 | 271 |
| 6 | 538 |
| 7 | 1458 |
| 8 | 2973 |
| 9 | 7826 |
| 10 | 19113 |
| 11 | 47074 |
| 12 | 115148 |
| 13 | 283156 |
| 14 | 698411 |
| 15 | 1720946 |
| 16 | 4258788 |
| 17 | 10518418 |
| 18 | 26019796 |
| 19 | 64391560 |
| 20 | 159345205 |
| 21 | 394533973 |
| 22 | 976872015 |
| 23 | 2419079852 |
| 24 | 5991435758 |
| 25 | 14839400772 |
| 26 | 36760610050 |
| 27 | 91064615465 |
[1,49,53,115,271,538,1458,2973,7826,19113,47074, 115148,283156,698411,1720946,4258788,10518418, 26019796,64391560,159345205,394533973,976872015, 2419079852,5991435758,14839400772,36760610050, 91064615465] |