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| n | a(n) |
|---|---|
| 1 | 111 |
| 2 | 2026 |
| 3 | 16104 |
| 4 | 81664 |
| 5 | 311498 |
| 6 | 974944 |
| 7 | 2637228 |
| 8 | 6376143 |
| 9 | 14100493 |
| 10 | 28998090 |
| 11 | 56144452 |
| 12 | 103306710 |
| 13 | 181980592 |
| 14 | 308701712 |
| 15 | 506675752 |
| 16 | 807775485 |
| 17 | 1254955947 |
| 18 | 1905142426 |
| 19 | 2832649296 |
| 20 | 4133191084 |
| 21 | 5928550518 |
| 22 | 8371971664 |
| 23 | 11654349620 |
[111,2026,16104,81664,311498,974944,2637228, 6376143,14100493,28998090,56144452,103306710, 181980592,308701712,506675752,807775485, 1254955947,1905142426,2832649296,4133191084, 5928550518,8371971664,11654349620] |