The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 8 |
| 6 | 15 |
| 7 | 23 |
| 8 | 39 |
| 9 | 59 |
| 10 | 94 |
| 11 | 140 |
| 12 | 216 |
| 13 | 316 |
| 14 | 472 |
| 15 | 682 |
| 16 | 994 |
| 17 | 1414 |
| 18 | 2022 |
| 19 | 2837 |
| 20 | 3989 |
| 21 | 5530 |
| 22 | 7663 |
| 23 | 10504 |
| 24 | 14381 |
| 25 | 19509 |
| 26 | 26417 |
| 27 | 35510 |
| 28 | 47618 |
| 29 | 63461 |
| 30 | 84365 |
| 31 | 111553 |
| 32 | 147126 |
| 33 | 193144 |
| 34 | 252892 |
| 35 | 329773 |
| 36 | 428931 |
| 37 | 555852 |
| 38 | 718547 |
| 39 | 925795 |
| 40 | 1189946 |
| 41 | 1524863 |
| 42 | 1949540 |
[1,0,1,2,5,8,15,23,39,59,94,140,216,316,472,682, 994,1414,2022,2837,3989,5530,7663,10504,14381, 19509,26417,35510,47618,63461,84365,111553,147126, 193144,252892,329773,428931,555852,718547,925795, 1189946,1524863,1949540] |