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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 16 |
| 4 | 49 |
| 5 | 129 |
| 6 | 341 |
| 7 | 833 |
| 8 | 2029 |
| 9 | 4760 |
| 10 | 11068 |
| 11 | 25182 |
| 12 | 56888 |
| 13 | 126661 |
| 14 | 280169 |
| 15 | 613893 |
| 16 | 1337386 |
| 17 | 2893793 |
| 18 | 6232013 |
| 19 | 13352607 |
| 20 | 28497552 |
| 21 | 60580905 |
| 22 | 128368080 |
| 23 | 271153740 |
| 24 | 571224871 |
| 25 | 1200298631 |
| 26 | 2516483260 |
| 27 | 5264785310 |
| 28 | 10993631034 |
| 29 | 22915508186 |
| 30 | 47688470005 |
[1,5,16,49,129,341,833,2029,4760,11068,25182, 56888,126661,280169,613893,1337386,2893793, 6232013,13352607,28497552,60580905,128368080, 271153740,571224871,1200298631,2516483260, 5264785310,10993631034,22915508186,47688470005] |