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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 12 |
| 4 | 50 |
| 5 | 120 |
| 6 | 493 |
| 7 | 1184 |
| 8 | 4863 |
| 9 | 11684 |
| 10 | 47994 |
| 11 | 115320 |
| 12 | 473699 |
| 13 | 1138208 |
| 14 | 4675397 |
| 15 | 11234076 |
| 16 | 46145994 |
| 17 | 110879896 |
| 18 | 455459165 |
| 19 | 1094380256 |
| 20 | 4495364247 |
| 21 | 10801490596 |
| 22 | 44369070466 |
| 23 | 106610292568 |
| 24 | 437921001875 |
| 25 | 1052239446112 |
| 26 | 4322263276333 |
[1,5,12,50,120,493,1184,4863,11684,47994,115320, 473699,1138208,4675397,11234076,46145994, 110879896,455459165,1094380256,4495364247, 10801490596,44369070466,106610292568,437921001875, 1052239446112,4322263276333] |