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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 47 |
| 3 | 347 |
| 4 | 6079 |
| 5 | 10139 |
| 6 | 147311 |
| 7 | 687931 |
| 8 | 18874111 |
| 9 | 37748411 |
| 10 | 104857199 |
| 11 | 276823579 |
| 12 | 805305791 |
| 13 | 29662117211 |
| 14 | 30064770287 |
| 15 | 64424508539 |
| 16 | 2473901161471 |
| 17 | 11098195491707 |
| 18 | 7421703486191 |
| 19 | 83562883709531 |
| 20 | 527765581330879 |
| 21 | 369435906930971 |
| 22 | 27866022694353007 |
| 23 | 19421773393033147 |
[3,47,347,6079,10139,147311,687931,18874111, 37748411,104857199,276823579,805305791, 29662117211,30064770287,64424508539,2473901161471, 11098195491707,7421703486191,83562883709531, 527765581330879,369435906930971,27866022694353007, 19421773393033147] |