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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 15 |
| 3 | 21 |
| 4 | 35 |
| 5 | 55 |
| 6 | 77 |
| 7 | 91 |
| 8 | 99 |
| 9 | 117 |
| 10 | 143 |
| 11 | 153 |
| 12 | 171 |
| 13 | 187 |
| 14 | 209 |
| 15 | 221 |
| 16 | 247 |
| 17 | 253 |
| 18 | 299 |
| 19 | 323 |
| 20 | 325 |
| 21 | 377 |
| 22 | 391 |
| 23 | 403 |
| 24 | 425 |
| 25 | 437 |
| 26 | 475 |
| 27 | 493 |
| 28 | 527 |
| 29 | 551 |
| 30 | 575 |
| 31 | 589 |
| 32 | 621 |
| 33 | 629 |
| 34 | 667 |
| 35 | 697 |
| 36 | 703 |
| 37 | 713 |
| 38 | 725 |
| 39 | 775 |
| 40 | 779 |
| 41 | 783 |
| 42 | 817 |
| 43 | 837 |
| 44 | 851 |
| 45 | 899 |
| 46 | 925 |
| 47 | 943 |
| 48 | 957 |
| 49 | 989 |
| 50 | 999 |
| 51 | 1023 |
| 52 | 1025 |
| 53 | 1073 |
[4,15,21,35,55,77,91,99,117,143,153,171,187,209, 221,247,253,299,323,325,377,391,403,425,437,475, 493,527,551,575,589,621,629,667,697,703,713,725, 775,779,783,817,837,851,899,925,943,957,989,999, 1023,1025,1073] |