n | a(n) |
---|---|
0 | 2 |
1 | 3 |
2 | 6 |
3 | 19 |
4 | 76 |
5 | 381 |
6 | 2286 |
7 | 16007 |
8 | 128056 |
9 | 1152505 |
10 | 11525050 |
11 | 126775551 |
12 | 1521306620 |
13 | 19776986061 |
14 | 276877804862 |
15 | 4153167072943 |
16 | 66450673167088 |
17 | 1129661443840497 |
18 | 20333905989128946 |
19 | 386344213793449975 |
20 | 7726884275868999516 |
[2,3,6,19,76,381,2286,16007,128056,1152505, 11525050,126775551,1521306620,19776986061, 276877804862,4153167072943,66450673167088, 1129661443840497,20333905989128946, 386344213793449975,7726884275868999516] |