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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 21 |
| 3 | 46 |
| 4 | 546 |
| 5 | 3046 |
| 6 | 12421 |
| 7 | 59296 |
| 8 | 59296 |
| 9 | 840546 |
| 10 | 8653046 |
| 11 | 28184296 |
| 12 | 125840546 |
| 13 | 369981171 |
| 14 | 2811387421 |
| 15 | 2811387421 |
| 16 | 2811387421 |
| 17 | 460575059296 |
| 18 | 2749393418671 |
| 19 | 10378787949921 |
| 20 | 48525760606171 |
| 21 | 143893192246796 |
| 22 | 2051241825059296 |
| 23 | 6819613407090546 |
| 24 | 30661471317246796 |
[0,1,21,46,546,3046,12421,59296,59296,840546, 8653046,28184296,125840546,369981171,2811387421, 2811387421,2811387421,460575059296,2749393418671, 10378787949921,48525760606171,143893192246796, 2051241825059296,6819613407090546, 30661471317246796] |