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A127985 as a simple table
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 28 |
| 5 | 67 |
| 6 | 156 |
| 7 | 355 |
| 8 | 796 |
| 9 | 1763 |
| 10 | 3868 |
| 11 | 8419 |
| 12 | 18204 |
| 13 | 39139 |
| 14 | 83740 |
| 15 | 178403 |
| 16 | 378652 |
| 17 | 800995 |
| 18 | 1689372 |
| 19 | 3553507 |
| 20 | 7456540 |
| 21 | 15612131 |
| 22 | 32622364 |
| 23 | 68040931 |
| 24 | 141674268 |
| 25 | 294533347 |
| 26 | 611436316 |
| 27 | 1267611875 |
| 28 | 2624702236 |
| 29 | 5428361443 |
[0,1,4,11,28,67,156,355,796,1763,3868,8419,18204, 39139,83740,178403,378652,800995,1689372,3553507, 7456540,15612131,32622364,68040931,141674268, 294533347,611436316,1267611875,2624702236, 5428361443] |