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| n | a(n) |
|---|---|
| 0 | 877 |
| 1 | 2407 |
| 2 | 7023 |
| 3 | 21709 |
| 4 | 70843 |
| 5 | 243235 |
| 6 | 875936 |
| 7 | 3299218 |
| 8 | 23308546 |
| 9 | 172449180 |
| 10 | 1332875540 |
| 11 | 10737968536 |
| 12 | 89983139114 |
| 13 | 782862305856 |
| 14 | 7059006496410 |
| 15 | 65863933456646 |
| 16 | 634989019444140 |
| 17 | 6317110311404960 |
| 18 | 64769247847559306 |
| 19 | 683631842962754366 |
| 20 | 7420272485570265946 |
[877,2407,7023,21709,70843,243235,875936,3299218, 23308546,172449180,1332875540,10737968536, 89983139114,782862305856,7059006496410, 65863933456646,634989019444140,6317110311404960, 64769247847559306,683631842962754366, 7420272485570265946] |