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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 10 |
| 12 | 109 |
| 13 | 857 |
| 14 | 6798 |
| 15 | 48007 |
| 16 | 338529 |
| 17 | 2267425 |
| 18 | 15164662 |
| 19 | 98964444 |
| 20 | 645978814 |
| 21 | 4168541022 |
| 22 | 26949303558 |
| 23 | 173445855265 |
| 24 | 1119737108943 |
| 25 | 7224864497439 |
| 26 | 46800745943134 |
| 27 | 303692912870933 |
| 28 | 1979556048016406 |
| 29 | 12943419575576650 |
| 30 | 85040314513698164 |
| 31 | 560910092712436079 |
[1,10,109,857,6798,48007,338529,2267425,15164662, 98964444,645978814,4168541022,26949303558, 173445855265,1119737108943,7224864497439, 46800745943134,303692912870933,1979556048016406, 12943419575576650,85040314513698164, 560910092712436079] |