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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 93 |
| 4 | 508 |
| 5 | 2555 |
| 6 | 12282 |
| 7 | 57337 |
| 8 | 262136 |
| 9 | 1179639 |
| 10 | 5242870 |
| 11 | 23068661 |
| 12 | 100663284 |
| 13 | 436207603 |
| 14 | 1879048178 |
| 15 | 8053063665 |
| 16 | 34359738352 |
| 17 | 146028888047 |
| 18 | 618475290606 |
| 19 | 2611340115949 |
| 20 | 10995116277740 |
| 21 | 46179488366571 |
| 22 | 193514046488554 |
[1,14,93,508,2555,12282,57337,262136,1179639, 5242870,23068661,100663284,436207603,1879048178, 8053063665,34359738352,146028888047,618475290606, 2611340115949,10995116277740,46179488366571, 193514046488554] |