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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 17 |
| 3 | 21 |
| 4 | 42 |
| 5 | 148 |
| 6 | 362 |
| 7 | 879 |
| 8 | 2447 |
| 9 | 6306 |
| 10 | 15905 |
| 11 | 42221 |
| 12 | 110418 |
| 13 | 283913 |
| 14 | 742439 |
| 15 | 1940186 |
| 16 | 5029913 |
| 17 | 13102975 |
| 18 | 34178122 |
| 19 | 88873888 |
| 20 | 231355589 |
| 21 | 602826384 |
| 22 | 1569061436 |
| 23 | 4084569987 |
| 24 | 10637783556 |
| 25 | 27695951899 |
| 26 | 72104297278 |
| 27 | 187752963431 |
[5,17,21,42,148,362,879,2447,6306,15905,42221, 110418,283913,742439,1940186,5029913,13102975, 34178122,88873888,231355589,602826384,1569061436, 4084569987,10637783556,27695951899,72104297278, 187752963431] |