The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 7 |
| 7 | 8 |
| 8 | 11 |
| 9 | 15 |
| 10 | 20 |
| 11 | 29 |
| 12 | 37 |
| 13 | 47 |
| 14 | 67 |
| 15 | 84 |
| 16 | 120 |
| 17 | 152 |
| 18 | 202 |
| 19 | 268 |
| 20 | 351 |
| 21 | 469 |
| 22 | 640 |
| 23 | 859 |
| 24 | 1150 |
| 25 | 1560 |
| 26 | 2071 |
| 27 | 2801 |
| 28 | 3753 |
| 29 | 5078 |
| 30 | 6743 |
| 31 | 9132 |
| 32 | 12232 |
| 33 | 16379 |
| 34 | 22010 |
| 35 | 29601 |
| 36 | 39694 |
| 37 | 53450 |
| 38 | 71840 |
| 39 | 96380 |
| 40 | 129668 |
| 41 | 174059 |
| 42 | 234111 |
| 43 | 314402 |
| 44 | 422498 |
| 45 | 567724 |
| 46 | 762488 |
| 47 | 1024579 |
| 48 | 1376675 |
| 49 | 1850127 |
| 50 | 2485463 |
| 51 | 3339795 |
[1,1,2,3,4,5,7,8,11,15,20,29,37,47,67,84,120,152, 202,268,351,469,640,859,1150,1560,2071,2801,3753, 5078,6743,9132,12232,16379,22010,29601,39694, 53450,71840,96380,129668,174059,234111,314402, 422498,567724,762488,1024579,1376675,1850127, 2485463,3339795] |