The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 127 |
| 3 | 2188 |
| 4 | 16255 |
| 5 | 78126 |
| 6 | 277876 |
| 7 | 823544 |
| 8 | 2080639 |
| 9 | 4785157 |
| 10 | 9922002 |
| 11 | 19487172 |
| 12 | 35565940 |
| 13 | 62748518 |
| 14 | 104590088 |
| 15 | 170939688 |
| 16 | 266321791 |
| 17 | 410338674 |
| 18 | 607714939 |
| 19 | 893871740 |
| 20 | 1269938130 |
| 21 | 1801914272 |
| 22 | 2474870844 |
| 23 | 3404825448 |
| 24 | 4552438132 |
| 25 | 6103593751 |
| 26 | 7969061786 |
| 27 | 10465138360 |
| 28 | 13386707720 |
| 29 | 17249876310 |
[1,127,2188,16255,78126,277876,823544,2080639, 4785157,9922002,19487172,35565940,62748518, 104590088,170939688,266321791,410338674,607714939, 893871740,1269938130,1801914272,2474870844, 3404825448,4552438132,6103593751,7969061786, 10465138360,13386707720,17249876310] |