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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 50 |
| 2 | 163 |
| 3 | 421 |
| 4 | 1005 |
| 5 | 2317 |
| 6 | 5245 |
| 7 | 11741 |
| 8 | 26077 |
| 9 | 57565 |
| 10 | 126429 |
| 11 | 276445 |
| 12 | 602077 |
| 13 | 1306589 |
| 14 | 2826205 |
| 15 | 6094813 |
| 16 | 13107165 |
| 17 | 28114909 |
| 18 | 60162013 |
| 19 | 128450525 |
| 20 | 273678301 |
| 21 | 581959645 |
| 22 | 1235222493 |
| 23 | 2617245661 |
| 24 | 5536481245 |
| 25 | 11693719517 |
[1,50,163,421,1005,2317,5245,11741,26077,57565, 126429,276445,602077,1306589,2826205,6094813, 13107165,28114909,60162013,128450525,273678301, 581959645,1235222493,2617245661,5536481245, 11693719517] |