The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 9 |
| 4 | 121 |
| 5 | 143 |
| 6 | 169 |
| 7 | 187 |
| 8 | 319 |
| 9 | 323 |
| 10 | 341 |
| 11 | 737 |
| 12 | 767 |
| 13 | 781 |
| 14 | 913 |
| 15 | 949 |
| 16 | 961 |
| 17 | 979 |
| 18 | 989 |
| 19 | 1273 |
| 20 | 1343 |
| 21 | 1691 |
| 22 | 1843 |
| 23 | 1961 |
| 24 | 3431 |
| 25 | 3481 |
| 26 | 3721 |
| 27 | 10201 |
| 28 | 10807 |
| 29 | 11413 |
| 30 | 12769 |
| 31 | 13231 |
| 32 | 15049 |
| 33 | 15151 |
| 34 | 15251 |
| 35 | 15347 |
| 36 | 15707 |
| 37 | 15857 |
| 38 | 16171 |
| 39 | 16837 |
| 40 | 16867 |
| 41 | 17161 |
[4,6,9,121,143,169,187,319,323,341,737,767,781, 913,949,961,979,989,1273,1343,1691,1843,1961,3431, 3481,3721,10201,10807,11413,12769,13231,15049, 15151,15251,15347,15707,15857,16171,16837,16867, 17161] |