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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 11 |
| 4 | 15 |
| 5 | 39 |
| 6 | 59 |
| 7 | 63 |
| 8 | 131 |
| 9 | 231 |
| 10 | 251 |
| 11 | 255 |
| 12 | 399 |
| 13 | 759 |
| 14 | 899 |
| 15 | 971 |
| 16 | 999 |
| 17 | 1019 |
| 18 | 1023 |
| 19 | 3471 |
| 20 | 3971 |
| 21 | 4071 |
| 22 | 4091 |
| 23 | 4095 |
| 24 | 13259 |
| 25 | 15759 |
| 26 | 16259 |
| 27 | 16359 |
| 28 | 16379 |
| 29 | 16383 |
| 30 | 49911 |
| 31 | 62411 |
| 32 | 64911 |
| 33 | 65411 |
| 34 | 65511 |
| 35 | 65531 |
| 36 | 65535 |
| 37 | 184019 |
| 38 | 246519 |
| 39 | 259019 |
| 40 | 261519 |
| 41 | 262019 |
| 42 | 262119 |
| 43 | 262139 |
[0,3,11,15,39,59,63,131,231,251,255,399,759,899, 971,999,1019,1023,3471,3971,4071,4091,4095,13259, 15759,16259,16359,16379,16383,49911,62411,64911, 65411,65511,65531,65535,184019,246519,259019, 261519,262019,262119,262139] |