n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 11 |
4 | 41 |
5 | 177 |
6 | 820 |
7 | 4020 |
8 | 20900 |
9 | 115473 |
10 | 677557 |
11 | 4211561 |
12 | 27640354 |
13 | 190891144 |
14 | 1382942176 |
15 | 10480109395 |
16 | 82864804285 |
17 | 682076675105 |
18 | 5832741942932 |
19 | 51724157711104 |
20 | 474869815108196 |
21 | 4506715736350193 |
22 | 44152005850890065 |
23 | 445958869286416705 |
[1,2,4,11,41,177,820,4020,20900,115473,677557, 4211561,27640354,190891144,1382942176,10480109395, 82864804285,682076675105,5832741942932, 51724157711104,474869815108196,4506715736350193, 44152005850890065,445958869286416705] |