The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 103 |
| 4 | 2349 |
| 5 | 72961 |
| 6 | 2874793 |
| 7 | 137399487 |
| 8 | 7724650601 |
| 9 | 499542475105 |
| 10 | 36532938744621 |
| 11 | 2981405776356679 |
| 12 | 268605245211618637 |
| 13 | 26480489709604968129 |
| 14 | 2835590837094928349921 |
| 15 | 327748240537910056251151 |
| 16 | 40669893396736296241364817 |
| 17 | 5392699633877586027282801217 |
[1,1,7,103,2349,72961,2874793,137399487, 7724650601,499542475105,36532938744621, 2981405776356679,268605245211618637, 26480489709604968129,2835590837094928349921, 327748240537910056251151, 40669893396736296241364817, 5392699633877586027282801217] |