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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 20 |
| 3 | 32 |
| 4 | 95 |
| 5 | 3420 |
| 6 | 8847 |
| 7 | 89927 |
| 8 | 494576 |
| 9 | 1347932 |
| 10 | 48525552 |
| 11 | 265807127 |
| 12 | 682379927 |
| 13 | 3237653360 |
| 14 | 52571448911 |
| 15 | 356954431580 |
| 16 | 1333226567615 |
| 17 | 6534477744687 |
| 18 | 69394484050880 |
| 19 | 10500704463815 |
| 20 | 378025360697340 |
| 21 | 13608912985104240 |
| 22 | 60046182811381232 |
| 23 | 227226500274052935 |
| 24 | 442409686123219952 |
| 25 | 15926748700435918272 |
[2,20,32,95,3420,8847,89927,494576,1347932, 48525552,265807127,682379927,3237653360, 52571448911,356954431580,1333226567615, 6534477744687,69394484050880,10500704463815, 378025360697340,13608912985104240, 60046182811381232,227226500274052935, 442409686123219952,15926748700435918272] |