n | a(n) |
---|---|
4 | 1 |
5 | 10 |
6 | 231 |
7 | 2300 |
8 | 14820 |
9 | 72905 |
10 | 298925 |
11 | 1077748 |
12 | 3540913 |
13 | 10871723 |
14 | 31775031 |
15 | 89633545 |
16 | 246575109 |
17 | 666605513 |
18 | 1781049298 |
19 | 4721874921 |
20 | 12456394685 |
21 | 32758238316 |
22 | 85985810716 |
23 | 225446971141 |
24 | 590714939822 |
25 | 1547211717890 |
26 | 4051642877482 |
27 | 10608719012366 |
28 | 27775885869046 |
[1,10,231,2300,14820,72905,298925,1077748,3540913, 10871723,31775031,89633545,246575109,666605513, 1781049298,4721874921,12456394685,32758238316, 85985810716,225446971141,590714939822, 1547211717890,4051642877482,10608719012366, 27775885869046] |