n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 93 |
4 | 639 |
5 | 4578 |
6 | 33423 |
7 | 246816 |
8 | 1838367 |
9 | 13788399 |
10 | 104011140 |
11 | 788315124 |
12 | 5998380543 |
13 | 45794787678 |
14 | 350619595614 |
15 | 2691082393818 |
16 | 20699166876831 |
17 | 159515321712480 |
18 | 1231354153215123 |
19 | 9519556856284218 |
20 | 73694926944160164 |
21 | 571201080979318470 |
[1,3,15,93,639,4578,33423,246816,1838367,13788399, 104011140,788315124,5998380543,45794787678, 350619595614,2691082393818,20699166876831, 159515321712480,1231354153215123,9519556856284218, 73694926944160164,571201080979318470] |