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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 19 |
| 4 | 48 |
| 5 | 109 |
| 6 | 234 |
| 7 | 487 |
| 8 | 996 |
| 9 | 2017 |
| 10 | 4062 |
| 11 | 8155 |
| 12 | 16344 |
| 13 | 32725 |
| 14 | 65490 |
| 15 | 131023 |
| 16 | 262092 |
| 17 | 524233 |
| 18 | 1048518 |
| 19 | 2097091 |
| 20 | 4194240 |
| 21 | 8388541 |
| 22 | 16777146 |
| 23 | 33554359 |
| 24 | 67108788 |
| 25 | 134217649 |
| 26 | 268435374 |
| 27 | 536870827 |
| 28 | 1073741736 |
| 29 | 2147483557 |
[1,6,19,48,109,234,487,996,2017,4062,8155,16344, 32725,65490,131023,262092,524233,1048518,2097091, 4194240,8388541,16777146,33554359,67108788, 134217649,268435374,536870827,1073741736, 2147483557] |