n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 76 |
4 | 337 |
5 | 1496 |
6 | 6641 |
7 | 29480 |
8 | 130865 |
9 | 580924 |
10 | 2578785 |
11 | 11447508 |
12 | 50816737 |
13 | 225581040 |
14 | 1001378849 |
15 | 4445229968 |
16 | 19732860833 |
17 | 87596322228 |
18 | 388849631729 |
19 | 1726145941404 |
20 | 7662550168241 |
21 | 34014896233544 |
22 | 150995835638929 |
23 | 670286989081400 |
24 | 2975477077435217 |
25 | 13208467391670124 |
26 | 58633827885912001 |
27 | 260281959337906852 |
[1,4,17,76,337,1496,6641,29480,130865,580924, 2578785,11447508,50816737,225581040,1001378849, 4445229968,19732860833,87596322228,388849631729, 1726145941404,7662550168241,34014896233544, 150995835638929,670286989081400,2975477077435217, 13208467391670124,58633827885912001, 260281959337906852] |