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| n | a(n) |
|---|---|
| 1 | 22 |
| 2 | 484 |
| 3 | 2974 |
| 4 | 15495 |
| 5 | 68745 |
| 6 | 237576 |
| 7 | 804887 |
| 8 | 2408502 |
| 9 | 6896518 |
| 10 | 18962878 |
| 11 | 49914553 |
| 12 | 128946177 |
| 13 | 325003322 |
| 14 | 806285935 |
| 15 | 1976689512 |
| 16 | 4789781866 |
| 17 | 11521436034 |
| 18 | 27522800939 |
| 19 | 65396285319 |
| 20 | 154757348476 |
| 21 | 364908847989 |
| 22 | 858133879200 |
[22,484,2974,15495,68745,237576,804887,2408502, 6896518,18962878,49914553,128946177,325003322, 806285935,1976689512,4789781866,11521436034, 27522800939,65396285319,154757348476,364908847989, 858133879200] |