n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 30 |
3 | 138 |
4 | 606 |
5 | 2586 |
6 | 10818 |
7 | 44574 |
8 | 181542 |
9 | 732678 |
10 | 2935218 |
11 | 11687202 |
12 | 46296210 |
13 | 182588850 |
14 | 717395262 |
15 | 2809372302 |
16 | 10969820358 |
17 | 42724062966 |
18 | 166015496838 |
19 | 643768299018 |
20 | 2491738141314 |
21 | 9628130289018 |
22 | 37146098272266 |
23 | 143110933254702 |
24 | 550643544948090 |
[1,6,30,138,606,2586,10818,44574,181542,732678, 2935218,11687202,46296210,182588850,717395262, 2809372302,10969820358,42724062966,166015496838, 643768299018,2491738141314,9628130289018, 37146098272266,143110933254702,550643544948090] |