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A149443 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 13 |
| 4 | 47 |
| 5 | 190 |
| 6 | 763 |
| 7 | 3227 |
| 8 | 13927 |
| 9 | 60718 |
| 10 | 270671 |
| 11 | 1215297 |
| 12 | 5514230 |
| 13 | 25266201 |
| 14 | 116347060 |
| 15 | 539873745 |
| 16 | 2516929673 |
| 17 | 11787991535 |
| 18 | 55463882701 |
| 19 | 261804584175 |
| 20 | 1240265555449 |
| 21 | 5892529135236 |
| 22 | 28069611267573 |
| 23 | 134054703500009 |
| 24 | 641577591353535 |
| 25 | 3077013944343179 |
| 26 | 14784766543766619 |
| 27 | 71160899170055625 |
[1,1,4,13,47,190,763,3227,13927,60718,270671, 1215297,5514230,25266201,116347060,539873745, 2516929673,11787991535,55463882701,261804584175, 1240265555449,5892529135236,28069611267573, 134054703500009,641577591353535,3077013944343179, 14784766543766619,71160899170055625] |