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| n | a(n) |
|---|---|
| 1 | 112 |
| 2 | 384 |
| 3 | 1264 |
| 4 | 4292 |
| 5 | 14272 |
| 6 | 48300 |
| 7 | 161168 |
| 8 | 544460 |
| 9 | 1820160 |
| 10 | 6141480 |
| 11 | 20556600 |
| 12 | 69298740 |
| 13 | 232159624 |
| 14 | 782096432 |
| 15 | 2621850152 |
| 16 | 8827674288 |
| 17 | 29608245144 |
| 18 | 99647390252 |
| 19 | 334350373304 |
| 20 | 1124887110036 |
| 21 | 3775523491352 |
| 22 | 12698981481044 |
[112,384,1264,4292,14272,48300,161168,544460, 1820160,6141480,20556600,69298740,232159624, 782096432,2621850152,8827674288,29608245144, 99647390252,334350373304,1124887110036, 3775523491352,12698981481044] |