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A007049 as a simple table
| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 2 |
| 5 | 7 |
| 6 | 17 |
| 7 | 49 |
| 8 | 134 |
| 9 | 368 |
| 10 | 1017 |
| 11 | 2806 |
| 12 | 7743 |
| 13 | 21374 |
| 14 | 59015 |
| 15 | 162942 |
| 16 | 449916 |
| 17 | 1242352 |
| 18 | 3430578 |
| 19 | 9473170 |
| 20 | 26159353 |
| 21 | 72237232 |
| 22 | 199478805 |
| 23 | 550850090 |
| 24 | 1521145442 |
| 25 | 4200572421 |
| 26 | 11599692758 |
| 27 | 32032045540 |
| 28 | 88455119858 |
| 29 | 244265061492 |
| 30 | 674527681575 |
[1,2,7,17,49,134,368,1017,2806,7743,21374,59015, 162942,449916,1242352,3430578,9473170,26159353, 72237232,199478805,550850090,1521145442, 4200572421,11599692758,32032045540,88455119858, 244265061492,674527681575] |