The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 26 |
| 1 | 53 |
| 2 | 132 |
| 3 | 6917 |
| 4 | 13966 |
| 5 | 34849 |
| 6 | 1826114 |
| 7 | 3687077 |
| 8 | 9200268 |
| 9 | 482101013 |
| 10 | 973402294 |
| 11 | 2428905601 |
| 12 | 127276493546 |
| 13 | 256981892693 |
| 14 | 641240278932 |
| 15 | 33601476397157 |
| 16 | 67844193073246 |
| 17 | 169289862543649 |
| 18 | 8870917045342994 |
| 19 | 17911123953229637 |
| 20 | 44693164951802268 |
[26,53,132,6917,13966,34849,1826114,3687077, 9200268,482101013,973402294,2428905601, 127276493546,256981892693,641240278932, 33601476397157,67844193073246,169289862543649, 8870917045342994,17911123953229637, 44693164951802268] |