The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 21 |
| 3 | 46 |
| 4 | 321 |
| 5 | 501 |
| 6 | 721 |
| 7 | 1126 |
| 8 | 2206 |
| 9 | 2881 |
| 10 | 3646 |
| 11 | 3921 |
| 12 | 4501 |
| 13 | 7606 |
| 14 | 10581 |
| 15 | 11521 |
| 16 | 13521 |
| 17 | 14581 |
| 18 | 15681 |
| 19 | 16246 |
| 20 | 18001 |
| 21 | 19846 |
| 22 | 20481 |
| 23 | 21781 |
| 24 | 23806 |
| 25 | 24501 |
| 26 | 27381 |
| 27 | 30421 |
| 28 | 32001 |
| 29 | 38721 |
| 30 | 40501 |
| 31 | 42321 |
| 32 | 48021 |
| 33 | 61606 |
| 34 | 64981 |
| 35 | 72001 |
| 36 | 79381 |
| 37 | 83206 |
| 38 | 89781 |
| 39 | 106581 |
| 40 | 121681 |
[6,21,46,321,501,721,1126,2206,2881,3646,3921, 4501,7606,10581,11521,13521,14581,15681,16246, 18001,19846,20481,21781,23806,24501,27381,30421, 32001,38721,40501,42321,48021,61606,64981,72001, 79381,83206,89781,106581,121681] |