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| n | a(n) |
|---|---|
| 1 | 14 |
| 2 | 196 |
| 3 | 546 |
| 4 | 3850 |
| 5 | 14896 |
| 6 | 84266 |
| 7 | 370734 |
| 8 | 1922564 |
| 9 | 8935850 |
| 10 | 44655394 |
| 11 | 212625504 |
| 12 | 1045480786 |
| 13 | 5031607126 |
| 14 | 24563900900 |
| 15 | 118782802866 |
| 16 | 578049254426 |
| 17 | 2801168057744 |
| 18 | 13612500276634 |
| 19 | 66026807997150 |
| 20 | 320661548440324 |
[14,196,546,3850,14896,84266,370734,1922564, 8935850,44655394,212625504,1045480786,5031607126, 24563900900,118782802866,578049254426, 2801168057744,13612500276634,66026807997150, 320661548440324] |