| n | a(n) |
|---|---|
| 1 | 310 |
| 2 | 1524 |
| 3 | 7562 |
| 4 | 39236 |
| 5 | 201754 |
| 6 | 1033140 |
| 7 | 5302002 |
| 8 | 27377802 |
| 9 | 140907656 |
| 10 | 723464076 |
| 11 | 3719653604 |
| 12 | 19172131806 |
| 13 | 98659238520 |
| 14 | 507065229134 |
| 15 | 2608372320890 |
| 16 | 13432072024666 |
| 17 | 69112775082390 |
| 18 | 355397881712346 |
| 19 | 1828490598631476 |
[310,1524,7562,39236,201754,1033140,5302002, 27377802,140907656,723464076,3719653604, 19172131806,98659238520,507065229134, 2608372320890,13432072024666,69112775082390, 355397881712346,1828490598631476] |