A017506 - OEIS

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A017506 as a simple table

n	a(n)
0	3486784401
1	10240000000000
2	819628286980801
3	17080198121677824
4	174887470365513049
5	1152921504606846976
6	5631351470947265625
7	22130157888803070976
8	73742412689492826049
9	215892499727278669824

[3486784401,10240000000000,819628286980801, 17080198121677824,174887470365513049, 1152921504606846976,5631351470947265625, 22130157888803070976,73742412689492826049, 215892499727278669824]