n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 16 |
4 | 106 |
5 | 861 |
6 | 7216 |
7 | 61938 |
8 | 541854 |
9 | 4814936 |
10 | 43336106 |
11 | 394050419 |
12 | 3612791400 |
13 | 33353349498 |
14 | 309745405634 |
15 | 2891246183239 |
16 | 27107799609004 |
17 | 255151905596682 |
18 | 2409933230413924 |
19 | 22832347500212719 |
20 | 216919281298152512 |
21 | 2066001163137387739 |
22 | 19721816247905813257 |
[1,4,16,106,861,7216,61938,541854,4814936, 43336106,394050419,3612791400,33353349498, 309745405634,2891246183239,27107799609004, 255151905596682,2409933230413924, 22832347500212719,216919281298152512, 2066001163137387739,19721816247905813257] |