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| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 277 |
| 3 | 2132 |
| 4 | 12521 |
| 5 | 60344 |
| 6 | 249641 |
| 7 | 913748 |
| 8 | 3023603 |
| 9 | 9190984 |
| 10 | 25981835 |
| 11 | 68967340 |
| 12 | 173242095 |
| 13 | 414433320 |
| 14 | 949144335 |
| 15 | 2090284620 |
| 16 | 4443280530 |
| 17 | 9145850640 |
| 18 | 18279915390 |
| 19 | 35563612920 |
| 20 | 67490348310 |
| 21 | 125168633040 |
| 22 | 227242504470 |
[24,277,2132,12521,60344,249641,913748,3023603, 9190984,25981835,68967340,173242095,414433320, 949144335,2090284620,4443280530,9145850640, 18279915390,35563612920,67490348310,125168633040, 227242504470] |