n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 22 |
4 | 154 |
5 | 1306 |
6 | 12994 |
7 | 148282 |
8 | 1908274 |
9 | 27333706 |
10 | 431220034 |
11 | 7428550042 |
12 | 138737478994 |
13 | 2792050329706 |
14 | 60231133487074 |
15 | 1386484468239802 |
16 | 33921605427779314 |
17 | 878976357571495306 |
18 | 24046780495646314114 |
19 | 692622345890928153562 |
20 | 20950628198687114521234 |
21 | 663992311200423614606506 |
[1,4,22,154,1306,12994,148282,1908274,27333706, 431220034,7428550042,138737478994,2792050329706, 60231133487074,1386484468239802,33921605427779314, 878976357571495306,24046780495646314114, 692622345890928153562,20950628198687114521234, 663992311200423614606506] |