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| n | a(n) |
|---|---|
| 1 | 14 |
| 2 | 196 |
| 3 | 966 |
| 4 | 3276 |
| 5 | 15386 |
| 6 | 61754 |
| 7 | 287140 |
| 8 | 1247736 |
| 9 | 5805450 |
| 10 | 26247900 |
| 11 | 122620446 |
| 12 | 566352486 |
| 13 | 2658874036 |
| 14 | 12435237724 |
| 15 | 58661967966 |
| 16 | 276563762860 |
| 17 | 1310299936722 |
| 18 | 6211941942146 |
| 19 | 29540255436804 |
| 20 | 140624053199280 |
| 21 | 670822454889090 |
[14,196,966,3276,15386,61754,287140,1247736, 5805450,26247900,122620446,566352486,2658874036, 12435237724,58661967966,276563762860, 1310299936722,6211941942146,29540255436804, 140624053199280,670822454889090] |