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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 28 |
| 5 | 76 |
| 6 | 256 |
| 7 | 1072 |
| 8 | 4288 |
| 9 | 16576 |
| 10 | 65536 |
| 11 | 262912 |
| 12 | 1051648 |
| 13 | 4197376 |
| 14 | 16777216 |
| 15 | 67121152 |
| 16 | 268484608 |
| 17 | 1073790976 |
| 18 | 4294967296 |
| 19 | 17180065792 |
| 20 | 68720263168 |
| 21 | 274878693376 |
| 22 | 1099511627776 |
| 23 | 4398049656832 |
| 24 | 17592198627328 |
| 25 | 70368756760576 |
| 26 | 281474976710656 |
| 27 | 1125899957174272 |
| 28 | 4503599828697088 |
| 29 | 18014398710808576 |
[1,1,7,28,76,256,1072,4288,16576,65536,262912, 1051648,4197376,16777216,67121152,268484608, 1073790976,4294967296,17180065792,68720263168, 274878693376,1099511627776,4398049656832, 17592198627328,70368756760576,281474976710656, 1125899957174272,4503599828697088, 18014398710808576] |