n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 12 |
4 | 46 |
5 | 161 |
6 | 679 |
7 | 2679 |
8 | 11335 |
9 | 46123 |
10 | 202969 |
11 | 861581 |
12 | 3802695 |
13 | 16362599 |
14 | 73645207 |
15 | 323694943 |
16 | 1459832206 |
17 | 6466787674 |
18 | 29501513081 |
19 | 132348273267 |
20 | 604673867966 |
21 | 2726426138913 |
22 | 12550493380399 |
23 | 57060735346881 |
24 | 262973859896489 |
25 | 1199843537998945 |
26 | 5558950506623078 |
27 | 25511445519043023 |
[1,1,4,12,46,161,679,2679,11335,46123,202969, 861581,3802695,16362599,73645207,323694943, 1459832206,6466787674,29501513081,132348273267, 604673867966,2726426138913,12550493380399, 57060735346881,262973859896489,1199843537998945, 5558950506623078,25511445519043023] |