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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 13 |
| 3 | 31 |
| 4 | 181 |
| 5 | 257 |
| 6 | 263 |
| 7 | 283 |
| 8 | 383 |
| 9 | 457 |
| 10 | 467 |
| 11 | 499 |
| 12 | 547 |
| 13 | 653 |
| 14 | 719 |
| 15 | 751 |
| 16 | 809 |
| 17 | 821 |
| 18 | 919 |
| 19 | 971 |
| 20 | 1091 |
| 21 | 1151 |
| 22 | 1187 |
| 23 | 1217 |
| 24 | 1223 |
| 25 | 1237 |
| 26 | 1423 |
| 27 | 1471 |
| 28 | 1709 |
| 29 | 1721 |
| 30 | 1747 |
| 31 | 1879 |
| 32 | 2137 |
| 33 | 2141 |
| 34 | 2221 |
| 35 | 2267 |
| 36 | 2521 |
| 37 | 2593 |
| 38 | 2657 |
| 39 | 2659 |
| 40 | 2753 |
| 41 | 2909 |
| 42 | 2939 |
| 43 | 3011 |
| 44 | 3083 |
| 45 | 3257 |
[2,13,31,181,257,263,283,383,457,467,499,547,653, 719,751,809,821,919,971,1091,1151,1187,1217,1223, 1237,1423,1471,1709,1721,1747,1879,2137,2141,2221, 2267,2521,2593,2657,2659,2753,2909,2939,3011,3083, 3257] |