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A020964 as a simple table
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 11 |
| 3 | 28 |
| 4 | 70 |
| 5 | 171 |
| 6 | 417 |
| 7 | 1010 |
| 8 | 2444 |
| 9 | 5905 |
| 10 | 14263 |
| 11 | 34440 |
| 12 | 83154 |
| 13 | 200759 |
| 14 | 484685 |
| 15 | 1170142 |
| 16 | 2824984 |
| 17 | 6820125 |
| 18 | 16465251 |
| 19 | 39750644 |
| 20 | 95966558 |
| 21 | 231683779 |
| 22 | 559334137 |
| 23 | 1350352074 |
| 24 | 3260038308 |
| 25 | 7870428713 |
| 26 | 19000895759 |
[4,11,28,70,171,417,1010,2444,5905,14263,34440, 83154,200759,484685,1170142,2824984,6820125, 16465251,39750644,95966558,231683779,559334137, 1350352074,3260038308,7870428713,19000895759] |