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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 29 |
| 6 | 79 |
| 7 | 225 |
| 8 | 677 |
| 9 | 2141 |
| 10 | 7121 |
| 11 | 24693 |
| 12 | 89117 |
| 13 | 333312 |
| 14 | 1288949 |
| 15 | 5140039 |
| 16 | 21094565 |
| 17 | 88931387 |
| 18 | 384544989 |
| 19 | 1703083332 |
| 20 | 7715920544 |
| 21 | 35720666818 |
| 22 | 168809971994 |
| 23 | 813633173238 |
| 24 | 3996247863791 |
| 25 | 19986651995983 |
| 26 | 101715962631912 |
| 27 | 526405121697307 |
| 28 | 2768690275913665 |
| 29 | 14791474244527076 |
| 30 | 80224577967948446 |
[1,1,2,5,12,29,79,225,677,2141,7121,24693,89117, 333312,1288949,5140039,21094565,88931387, 384544989,1703083332,7715920544,35720666818, 168809971994,813633173238,3996247863791, 19986651995983,101715962631912,526405121697307, 2768690275913665,14791474244527076, 80224577967948446] |