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| n | a(n) |
|---|---|
| 1 | 260 |
| 2 | 576 |
| 3 | 1336 |
| 4 | 3756 |
| 5 | 9368 |
| 6 | 24392 |
| 7 | 59944 |
| 8 | 164576 |
| 9 | 411300 |
| 10 | 1098776 |
| 11 | 2746164 |
| 12 | 7479296 |
| 13 | 18813148 |
| 14 | 50697072 |
| 15 | 127845936 |
| 16 | 346693136 |
| 17 | 877012028 |
| 18 | 2367167080 |
| 19 | 6003249108 |
| 20 | 16226037056 |
| 21 | 41232724008 |
| 22 | 111162587792 |
| 23 | 283070770512 |
[260,576,1336,3756,9368,24392,59944,164576,411300, 1098776,2746164,7479296,18813148,50697072, 127845936,346693136,877012028,2367167080, 6003249108,16226037056,41232724008,111162587792, 283070770512] |