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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 2 |
| 5 | 15 |
| 6 | 33 |
| 7 | 35 |
| 8 | 59 |
| 9 | 63 |
| 10 | 97 |
| 11 | 99 |
| 12 | 139 |
| 13 | 143 |
| 14 | 193 |
| 15 | 195 |
| 16 | 251 |
| 17 | 255 |
| 18 | 321 |
| 19 | 323 |
| 20 | 395 |
| 21 | 399 |
| 22 | 481 |
| 23 | 483 |
| 24 | 571 |
| 25 | 575 |
| 26 | 673 |
| 27 | 675 |
| 28 | 779 |
| 29 | 783 |
| 30 | 897 |
| 31 | 899 |
| 32 | 1019 |
| 33 | 1023 |
| 34 | 1153 |
| 35 | 1155 |
| 36 | 1291 |
| 37 | 1295 |
| 38 | 1441 |
| 39 | 1443 |
| 40 | 1595 |
| 41 | 1599 |
| 42 | 1761 |
| 43 | 1763 |
| 44 | 1931 |
| 45 | 1935 |
| 46 | 2113 |
| 47 | 2115 |
| 48 | 2299 |
| 49 | 2303 |
| 50 | 2497 |
| 51 | 2499 |
[1,1,3,2,15,33,35,59,63,97,99,139,143,193,195,251, 255,321,323,395,399,481,483,571,575,673,675,779, 783,897,899,1019,1023,1153,1155,1291,1295,1441, 1443,1595,1599,1761,1763,1931,1935,2113,2115,2299, 2303,2497,2499] |