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| n | a(n) |
|---|---|
| 2 | 0 |
| 3 | 14 |
| 4 | 106 |
| 5 | 598 |
| 6 | 3002 |
| 7 | 14142 |
| 8 | 64106 |
| 9 | 283166 |
| 10 | 1228346 |
| 11 | 5257966 |
| 12 | 22281738 |
| 13 | 93689246 |
| 14 | 391512666 |
| 15 | 1627925006 |
| 16 | 6741353258 |
| 17 | 27821715326 |
| 18 | 114493140090 |
| 19 | 470023545198 |
| 20 | 1925545015370 |
| 21 | 7874137194718 |
| 22 | 32148981709466 |
| 23 | 131077794504654 |
| 24 | 533774656417642 |
| 25 | 2171261671337534 |
| 26 | 8823512782678714 |
| 27 | 35825200435380270 |
[0,14,106,598,3002,14142,64106,283166,1228346, 5257966,22281738,93689246,391512666,1627925006, 6741353258,27821715326,114493140090,470023545198, 1925545015370,7874137194718,32148981709466, 131077794504654,533774656417642,2171261671337534, 8823512782678714,35825200435380270] |