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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 21 |
| 3 | 85 |
| 4 | 129 |
| 5 | 201 |
| 6 | 237 |
| 7 | 324 |
| 8 | 325 |
| 9 | 517 |
| 10 | 549 |
| 11 | 669 |
| 12 | 837 |
| 13 | 865 |
| 14 | 1081 |
| 15 | 1137 |
| 16 | 1161 |
| 17 | 1165 |
| 18 | 1309 |
| 19 | 1389 |
| 20 | 1677 |
| 21 | 1765 |
| 22 | 2169 |
| 23 | 2233 |
| 24 | 2304 |
| 25 | 2305 |
| 26 | 2469 |
| 27 | 2709 |
| 28 | 2737 |
| 29 | 2761 |
| 30 | 3265 |
| 31 | 3297 |
| 32 | 3745 |
| 33 | 3961 |
| 34 | 4161 |
| 35 | 4285 |
| 36 | 4693 |
| 37 | 4705 |
| 38 | 4741 |
| 39 | 4989 |
| 40 | 5061 |
| 41 | 5221 |
| 42 | 5349 |
| 43 | 5817 |
| 44 | 5949 |
| 45 | 6249 |
| 46 | 6457 |
| 47 | 6517 |
| 48 | 6685 |
| 49 | 6789 |
| 50 | 6813 |
| 51 | 6853 |
| 52 | 6921 |
[4,21,85,129,201,237,324,325,517,549,669,837,865, 1081,1137,1161,1165,1309,1389,1677,1765,2169,2233, 2304,2305,2469,2709,2737,2761,3265,3297,3745,3961, 4161,4285,4693,4705,4741,4989,5061,5221,5349,5817, 5949,6249,6457,6517,6685,6789,6813,6853,6921] |