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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 13 |
| 4 | 30 |
| 5 | 56 |
| 6 | 127 |
| 7 | 243 |
| 8 | 508 |
| 9 | 999 |
| 10 | 2041 |
| 11 | 4038 |
| 12 | 8186 |
| 13 | 16261 |
| 14 | 32766 |
| 15 | 65280 |
| 16 | 131071 |
| 17 | 261663 |
| 18 | 524272 |
| 19 | 1047599 |
| 20 | 2097119 |
| 21 | 4192288 |
| 22 | 8388543 |
| 23 | 16773187 |
| 24 | 33554268 |
| 25 | 67100847 |
| 26 | 134217393 |
| 27 | 268419406 |
| 28 | 536870264 |
| 29 | 1073709703 |
| 30 | 2147482489 |
| 31 | 4294902970 |
| 32 | 8589932372 |
[1,2,6,13,30,56,127,243,508,999,2041,4038,8186, 16261,32766,65280,131071,261663,524272,1047599, 2097119,4192288,8388543,16773187,33554268, 67100847,134217393,268419406,536870264,1073709703, 2147482489,4294902970,8589932372] |