| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 34 |
| 2 | 455 |
| 3 | 3626 |
| 4 | 20580 |
| 5 | 91728 |
| 6 | 340956 |
| 7 | 1099890 |
| 8 | 3166449 |
| 9 | 8302294 |
| 10 | 20131111 |
| 11 | 45677996 |
| 12 | 97894160 |
| 13 | 199645824 |
| 14 | 389817072 |
| 15 | 732389580 |
| 16 | 1329624009 |
| 17 | 2340785370 |
| 18 | 4008235231 |
| 19 | 6693165094 |
| 20 | 10923775940 |
| 21 | 17459327600 |
| 22 | 27374197500 |
| 23 | 42166911150 |
| 24 | 63900046665 |
| 25 | 95377983246 |
[1,34,455,3626,20580,91728,340956,1099890,3166449, 8302294,20131111,45677996,97894160,199645824, 389817072,732389580,1329624009,2340785370, 4008235231,6693165094,10923775940,17459327600, 27374197500,42166911150,63900046665,95377983246] |