The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 9 |
| 3 | 15 |
| 4 | 21 |
| 5 | 33 |
| 6 | 38 |
| 7 | 58 |
| 8 | 65 |
| 9 | 86 |
| 10 | 106 |
| 11 | 121 |
| 12 | 249 |
| 13 | 895 |
| 14 | 989 |
| 15 | 1199 |
| 16 | 2059 |
| 17 | 3073 |
| 18 | 9206 |
| 19 | 12302 |
| 20 | 19766 |
| 21 | 33238 |
| 22 | 63109 |
| 23 | 197459 |
| 24 | 252982 |
| 25 | 283942 |
| 26 | 477931 |
| 27 | 691357 |
| 28 | 4598261 |
| 29 | 8671301 |
| 30 | 9819097 |
| 31 | 11176233 |
| 32 | 51113687 |
| 33 | 205150267 |
| 34 | 232797043 |
| 35 | 496450043 |
| 36 | 562358905 |
[4,9,15,21,33,38,58,65,86,106,121,249,895,989, 1199,2059,3073,9206,12302,19766,33238,63109, 197459,252982,283942,477931,691357,4598261, 8671301,9819097,11176233,51113687,205150267, 232797043,496450043,562358905] |