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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 14 |
| 5 | 35 |
| 6 | 69 |
| 7 | 158 |
| 8 | 302 |
| 9 | 679 |
| 10 | 1666 |
| 11 | 3263 |
| 12 | 7444 |
| 13 | 18390 |
| 14 | 36101 |
| 15 | 82469 |
| 16 | 157494 |
| 17 | 353912 |
| 18 | 868141 |
| 19 | 1700181 |
| 20 | 3878490 |
| 21 | 7403068 |
| 22 | 16630533 |
| 23 | 40788350 |
| 24 | 79876519 |
| 25 | 182210674 |
| 26 | 450124970 |
| 27 | 883619407 |
| 28 | 2018522577 |
| 29 | 3854834480 |
| 30 | 8662361456 |
| 31 | 21248630481 |
| 32 | 41613641555 |
| 33 | 94929932728 |
| 34 | 234513795173 |
[0,1,3,6,14,35,69,158,302,679,1666,3263,7444, 18390,36101,82469,157494,353912,868141,1700181, 3878490,7403068,16630533,40788350,79876519, 182210674,450124970,883619407,2018522577, 3854834480,8662361456,21248630481,41613641555, 94929932728,234513795173] |