A015034 - OEIS

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A015034 as a simple table

n	a(n)
0	1
1	1
2	17
3	4433
4	18245201
5	1197172898385
6	1255709588423576145
7	21068918017101222558779985
8	5655752483351603939678821837720145
9	24291387778773301588924456932322615789898321

[1,1,17,4433,18245201,1197172898385, 1255709588423576145,21068918017101222558779985, 5655752483351603939678821837720145, 24291387778773301588924456932322615789898321]