n | a(n) |
---|---|
0 | 3 |
1 | 20 |
2 | 146 |
3 | 1136 |
4 | 9218 |
5 | 76880 |
6 | 653186 |
7 | 5622896 |
8 | 48877058 |
9 | 428036240 |
10 | 3770308226 |
11 | 33362580656 |
12 | 296287600898 |
13 | 2638821947600 |
14 | 23555283963266 |
15 | 210639767346416 |
16 | 1886257414388738 |
17 | 16909829393522960 |
18 | 151723117614386306 |
[3,20,146,1136,9218,76880,653186,5622896,48877058, 428036240,3770308226,33362580656,296287600898, 2638821947600,23555283963266,210639767346416, 1886257414388738,16909829393522960, 151723117614386306] |