The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 323 |
| 3 | 329 |
| 4 | 377 |
| 5 | 451 |
| 6 | 861 |
| 7 | 1081 |
| 8 | 1819 |
| 9 | 1891 |
| 10 | 2033 |
| 11 | 2211 |
| 12 | 3653 |
| 13 | 3827 |
| 14 | 4089 |
| 15 | 4181 |
| 16 | 5671 |
| 17 | 5777 |
| 18 | 6601 |
| 19 | 6721 |
| 20 | 8149 |
| 21 | 8557 |
| 22 | 10877 |
| 23 | 11309 |
| 24 | 11663 |
| 25 | 13201 |
| 26 | 13861 |
| 27 | 13981 |
| 28 | 14701 |
| 29 | 15251 |
| 30 | 17119 |
| 31 | 17513 |
| 32 | 17711 |
| 33 | 17941 |
| 34 | 18407 |
| 35 | 19043 |
| 36 | 19951 |
| 37 | 20473 |
| 38 | 23407 |
| 39 | 25369 |
| 40 | 25651 |
| 41 | 25877 |
| 42 | 27323 |
| 43 | 27511 |
[21,323,329,377,451,861,1081,1819,1891,2033,2211, 3653,3827,4089,4181,5671,5777,6601,6721,8149,8557, 10877,11309,11663,13201,13861,13981,14701,15251, 17119,17513,17711,17941,18407,19043,19951,20473, 23407,25369,25651,25877,27323,27511] |