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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 47 |
| 9 | 2049 |
| 10 | 72989 |
| 11 | 2320389 |
| 12 | 72984903 |
| 13 | 2340136832 |
| 14 | 77373758909 |
| 15 | 2655913191455 |
| 16 | 94925974424159 |
| 17 | 3537409377070327 |
| 18 | 137498256564370813 |
| 19 | 5573810976335976071 |
| 20 | 235519207528086247775 |
| 21 | 10365638931006805924491 |
| 22 | 474762601555480759969273 |
[1,0,0,0,0,0,0,1,47,2049,72989,2320389,72984903, 2340136832,77373758909,2655913191455, 94925974424159,3537409377070327, 137498256564370813,5573810976335976071, 235519207528086247775,10365638931006805924491, 474762601555480759969273] |