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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 36 |
| 3 | 201 |
| 4 | 1116 |
| 5 | 6211 |
| 6 | 34581 |
| 7 | 192501 |
| 8 | 1071546 |
| 9 | 5964820 |
| 10 | 33203659 |
| 11 | 184830438 |
| 12 | 1028870637 |
| 13 | 5727277021 |
| 14 | 31881272165 |
| 15 | 177469235044 |
| 16 | 987894361908 |
| 17 | 5499180045361 |
| 18 | 30611553610680 |
| 19 | 170401260906615 |
| 20 | 948550017451201 |
| 21 | 5280167123920333 |
| 22 | 29392403504900866 |
| 23 | 163614780272069160 |
| 24 | 910772619152263675 |
| 25 | 5069876709305861450 |
| 26 | 28221807844318492913 |
[1,6,36,201,1116,6211,34581,192501,1071546, 5964820,33203659,184830438,1028870637,5727277021, 31881272165,177469235044,987894361908, 5499180045361,30611553610680,170401260906615, 948550017451201,5280167123920333, 29392403504900866,163614780272069160, 910772619152263675,5069876709305861450, 28221807844318492913] |