The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 109 |
| 3 | 747 |
| 4 | 3285 |
| 5 | 10799 |
| 6 | 29295 |
| 7 | 68781 |
| 8 | 145389 |
| 9 | 282771 |
| 10 | 514931 |
| 11 | 887733 |
| 12 | 1463059 |
| 13 | 2320007 |
| 14 | 3560523 |
| 15 | 5310021 |
| 16 | 7724815 |
| 17 | 10991973 |
| 18 | 15338839 |
| 19 | 21031377 |
| 20 | 28387187 |
| 21 | 37770899 |
| 22 | 49610615 |
| 23 | 64391723 |
| 24 | 82677087 |
| 25 | 105095693 |
| 26 | 132370313 |
| 27 | 165301879 |
[7,109,747,3285,10799,29295,68781,145389,282771, 514931,887733,1463059,2320007,3560523,5310021, 7724815,10991973,15338839,21031377,28387187, 37770899,49610615,64391723,82677087,105095693, 132370313,165301879] |