The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 10 |
| 7 | 18 |
| 8 | 29 |
| 9 | 39 |
| 10 | 106 |
| 11 | 210 |
| 12 | 413 |
| 13 | 807 |
| 14 | 1537 |
| 15 | 2767 |
| 16 | 4410 |
| 17 | 5947 |
| 18 | 16303 |
| 19 | 32604 |
| 20 | 65201 |
| 21 | 130383 |
| 22 | 260689 |
| 23 | 521071 |
| 24 | 1041018 |
| 25 | 2079163 |
| 26 | 4146433 |
| 27 | 8243968 |
| 28 | 16292448 |
| 29 | 31804567 |
| 30 | 60503719 |
| 31 | 108861423 |
| 32 | 173511575 |
| 33 | 234015294 |
| 34 | 641542162 |
[1,1,2,3,4,10,18,29,39,106,210,413,807,1537,2767, 4410,5947,16303,32604,65201,130383,260689,521071, 1041018,2079163,4146433,8243968,16292448,31804567, 60503719,108861423,173511575,234015294,641542162] |