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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 31 |
| 2 | 195 |
| 3 | 1237 |
| 4 | 7885 |
| 5 | 50399 |
| 6 | 322635 |
| 7 | 2067173 |
| 8 | 13251125 |
| 9 | 84966271 |
| 10 | 544886835 |
| 11 | 3494644117 |
| 12 | 22414043965 |
| 13 | 143763624959 |
| 14 | 922113238395 |
| 15 | 5914569009893 |
| 16 | 37937085615845 |
| 17 | 243335768930911 |
| 18 | 1560804720144675 |
| 19 | 10011324516035797 |
[5,31,195,1237,7885,50399,322635,2067173,13251125, 84966271,544886835,3494644117,22414043965, 143763624959,922113238395,5914569009893, 37937085615845,243335768930911,1560804720144675, 10011324516035797] |