n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 28 |
3 | 244 |
4 | 2396 |
5 | 25324 |
6 | 281140 |
7 | 3232352 |
8 | 38151196 |
9 | 459594316 |
10 | 5628197948 |
11 | 69859456440 |
12 | 876985904276 |
13 | 11115789165888 |
14 | 142066687799680 |
15 | 1828884017527504 |
16 | 23694360858872604 |
17 | 308714491495346028 |
18 | 4042605442981407388 |
19 | 53178663502737007352 |
[1,4,28,244,2396,25324,281140,3232352,38151196, 459594316,5628197948,69859456440,876985904276, 11115789165888,142066687799680,1828884017527504, 23694360858872604,308714491495346028, 4042605442981407388,53178663502737007352] |