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| n | a(n) |
|---|---|
| 2 | 14 |
| 3 | 66 |
| 4 | 300 |
| 5 | 1326 |
| 6 | 5750 |
| 7 | 24604 |
| 8 | 104268 |
| 9 | 438678 |
| 10 | 1835260 |
| 11 | 7643708 |
| 12 | 31719544 |
| 13 | 131230924 |
| 14 | 541549798 |
| 15 | 2229948752 |
| 16 | 9165030668 |
| 17 | 37606175462 |
| 18 | 154083290228 |
| 19 | 630512206892 |
| 20 | 2577105061928 |
| 21 | 10522561454372 |
| 22 | 42924408013628 |
| 23 | 174951432818024 |
| 24 | 712513363073720 |
| 25 | 2899738101749116 |
| 26 | 11793408213411000 |
| 27 | 47935401657804504 |
| 28 | 194728337295807856 |
[14,66,300,1326,5750,24604,104268,438678,1835260, 7643708,31719544,131230924,541549798,2229948752, 9165030668,37606175462,154083290228,630512206892, 2577105061928,10522561454372,42924408013628, 174951432818024,712513363073720,2899738101749116, 11793408213411000,47935401657804504, 194728337295807856] |