The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 7 |
| 3 | 30 |
| 4 | 84 |
| 5 | 192 |
| 6 | 377 |
| 7 | 674 |
| 8 | 1115 |
| 9 | 1747 |
| 10 | 2611 |
| 11 | 3765 |
| 12 | 5260 |
| 13 | 7166 |
| 14 | 9542 |
| 15 | 12470 |
| 16 | 16019 |
| 17 | 20282 |
| 18 | 25337 |
| 19 | 31289 |
| 20 | 38225 |
| 21 | 46262 |
| 22 | 55496 |
| 23 | 66055 |
| 24 | 78045 |
| 25 | 91606 |
| 26 | 106852 |
| 27 | 123935 |
| 28 | 142979 |
| 29 | 164147 |
| 30 | 187572 |
| 31 | 213429 |
| 32 | 241860 |
| 33 | 273052 |
| 34 | 307156 |
| 35 | 344370 |
| 36 | 384855 |
| 37 | 428821 |
| 38 | 476437 |
| 39 | 527925 |
[0,1,7,30,84,192,377,674,1115,1747,2611,3765,5260, 7166,9542,12470,16019,20282,25337,31289,38225, 46262,55496,66055,78045,91606,106852,123935, 142979,164147,187572,213429,241860,273052,307156, 344370,384855,428821,476437,527925] |