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A199874 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 37 |
| 5 | 147 |
| 6 | 611 |
| 7 | 2625 |
| 8 | 11564 |
| 9 | 51953 |
| 10 | 237123 |
| 11 | 1096420 |
| 12 | 5125063 |
| 13 | 24178427 |
| 14 | 114974387 |
| 15 | 550511901 |
| 16 | 2651896733 |
| 17 | 12843003108 |
| 18 | 62494595022 |
| 19 | 305400429548 |
| 20 | 1498184696271 |
| 21 | 7375179807191 |
| 22 | 36421312544431 |
| 23 | 180383163330765 |
| 24 | 895756907248150 |
| 25 | 4459095182031675 |
| 26 | 22247684478181317 |
[1,1,3,10,37,147,611,2625,11564,51953,237123, 1096420,5125063,24178427,114974387,550511901, 2651896733,12843003108,62494595022,305400429548, 1498184696271,7375179807191,36421312544431, 180383163330765,895756907248150,4459095182031675, 22247684478181317] |