n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 44 |
5 | 134 |
6 | 404 |
7 | 1212 |
8 | 3638 |
9 | 10915 |
10 | 32746 |
11 | 98239 |
12 | 294717 |
13 | 884153 |
14 | 2652459 |
15 | 7957379 |
16 | 23872137 |
17 | 71616412 |
18 | 214849236 |
19 | 644547710 |
20 | 1933643132 |
21 | 5800929396 |
22 | 17402788190 |
23 | 52208364570 |
24 | 156625093712 |
25 | 469875281138 |
26 | 1409625843415 |
27 | 4228877530246 |
28 | 12686632590738 |
29 | 38059897772216 |
[1,4,14,44,134,404,1212,3638,10915,32746,98239, 294717,884153,2652459,7957379,23872137,71616412, 214849236,644547710,1933643132,5800929396, 17402788190,52208364570,156625093712,469875281138, 1409625843415,4228877530246,12686632590738, 38059897772216] |