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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 21 |
| 3 | 91 |
| 4 | 336 |
| 5 | 651 |
| 6 | 1911 |
| 7 | 2451 |
| 8 | 5376 |
| 9 | 7371 |
| 10 | 13671 |
| 11 | 14763 |
| 12 | 30576 |
| 13 | 28731 |
| 14 | 51471 |
| 15 | 59241 |
| 16 | 86016 |
| 17 | 83811 |
| 18 | 154791 |
| 19 | 130683 |
| 20 | 218736 |
| 21 | 223041 |
| 22 | 310023 |
| 23 | 280371 |
| 24 | 489216 |
| 25 | 406875 |
| 26 | 603351 |
| 27 | 597051 |
| 28 | 823536 |
| 29 | 708123 |
| 30 | 1244061 |
| 31 | 924483 |
| 32 | 1376256 |
| 33 | 1343433 |
| 34 | 1760031 |
| 35 | 1595601 |
| 36 | 2476656 |
| 37 | 1875531 |
| 38 | 2744343 |
[1,21,91,336,651,1911,2451,5376,7371,13671,14763, 30576,28731,51471,59241,86016,83811,154791,130683, 218736,223041,310023,280371,489216,406875,603351, 597051,823536,708123,1244061,924483,1376256, 1343433,1760031,1595601,2476656,1875531,2744343] |