The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 27 |
| 1 | 28 |
| 2 | 139 |
| 3 | 167 |
| 4 | 306 |
| 5 | 779 |
| 6 | 1085 |
| 7 | 1864 |
| 8 | 8541 |
| 9 | 10405 |
| 10 | 570411 |
| 11 | 580816 |
| 12 | 2893675 |
| 13 | 3474491 |
| 14 | 6368166 |
| 15 | 16210823 |
| 16 | 22578989 |
| 17 | 38789812 |
| 18 | 177738237 |
| 19 | 216528049 |
| 20 | 11870252883 |
| 21 | 12086780932 |
| 22 | 60217376611 |
| 23 | 72304157543 |
| 24 | 132521534154 |
| 25 | 337347225851 |
| 26 | 469868760005 |
| 27 | 807215985856 |
[27,28,139,167,306,779,1085,1864,8541,10405, 570411,580816,2893675,3474491,6368166,16210823, 22578989,38789812,177738237,216528049,11870252883, 12086780932,60217376611,72304157543,132521534154, 337347225851,469868760005,807215985856] |