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A048898 as a simple table
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 7 |
| 3 | 57 |
| 4 | 182 |
| 5 | 2057 |
| 6 | 14557 |
| 7 | 45807 |
| 8 | 280182 |
| 9 | 280182 |
| 10 | 6139557 |
| 11 | 25670807 |
| 12 | 123327057 |
| 13 | 123327057 |
| 14 | 5006139557 |
| 15 | 11109655182 |
| 16 | 102662389557 |
| 17 | 407838170807 |
| 18 | 3459595983307 |
| 19 | 3459595983307 |
| 20 | 79753541295807 |
| 21 | 365855836217682 |
| 22 | 2273204469030182 |
| 23 | 2273204469030182 |
| 24 | 49956920289342682 |
[0,2,7,57,182,2057,14557,45807,280182,280182, 6139557,25670807,123327057,123327057,5006139557, 11109655182,102662389557,407838170807, 3459595983307,3459595983307,79753541295807, 365855836217682,2273204469030182,2273204469030182, 49956920289342682] |