n | a(n) |
---|---|
0 | 4 |
1 | 21 |
2 | 187 |
3 | 2037 |
4 | 23340 |
5 | 272696 |
6 | 3217385 |
7 | 38159996 |
8 | 454037291 |
9 | 5413203476 |
10 | 64627581335 |
11 | 772339921008 |
12 | 9236630484442 |
13 | 110524101601776 |
14 | 1323077631062559 |
15 | 15843823911284864 |
16 | 189780898457455962 |
17 | 2273742258742720401 |
18 | 27246430062475947106 |
19 | 326546194954714602111 |
[4,21,187,2037,23340,272696,3217385,38159996, 454037291,5413203476,64627581335,772339921008, 9236630484442,110524101601776,1323077631062559, 15843823911284864,189780898457455962, 2273742258742720401,27246430062475947106, 326546194954714602111] |