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A007714 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 15 |
| 4 | 55 |
| 5 | 170 |
| 6 | 571 |
| 7 | 1789 |
| 8 | 5727 |
| 9 | 17836 |
| 10 | 55627 |
| 11 | 171169 |
| 12 | 524879 |
| 13 | 1595896 |
| 14 | 4829894 |
| 15 | 14527981 |
| 16 | 43497312 |
| 17 | 129588391 |
| 18 | 384430264 |
| 19 | 1135607519 |
| 20 | 3341662498 |
| 21 | 9796626673 |
| 22 | 28620419254 |
| 23 | 83334382425 |
| 24 | 241879403752 |
| 25 | 699937499318 |
| 26 | 2019607806247 |
| 27 | 5811320364410 |
| 28 | 16677611788799 |
[1,1,5,15,55,170,571,1789,5727,17836,55627,171169, 524879,1595896,4829894,14527981,43497312, 129588391,384430264,1135607519,3341662498, 9796626673,28620419254,83334382425,241879403752, 699937499318,2019607806247,5811320364410, 16677611788799] |