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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 16 |
| 4 | 72 |
| 5 | 256 |
| 6 | 1056 |
| 7 | 4096 |
| 8 | 16512 |
| 9 | 65536 |
| 10 | 262656 |
| 11 | 1048576 |
| 12 | 4196352 |
| 13 | 16777216 |
| 14 | 67117056 |
| 15 | 268435456 |
| 16 | 1073774592 |
| 17 | 4294967296 |
| 18 | 17180000256 |
| 19 | 68719476736 |
| 20 | 274878431232 |
| 21 | 1099511627776 |
| 22 | 4398048608256 |
| 23 | 17592186044416 |
| 24 | 70368752566272 |
[1,1,6,16,72,256,1056,4096,16512,65536,262656, 1048576,4196352,16777216,67117056,268435456, 1073774592,4294967296,17180000256,68719476736, 274878431232,1099511627776,4398048608256, 17592186044416,70368752566272] |