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A007925 as a simple table

na(n)
0-1
1-1
2-1
317
4399
57849
6162287
73667649
891171007
92486784401
1074062575399
112395420006033
1283695120256591
133143661612445145
14126375169532421599
155415486851106043649
16246486713303685957375
1711877172892329028459041
18604107995057426434824791

[-1,-1,-1,17,399,7849,162287,3667649,91171007,
 2486784401,74062575399,2395420006033,
 83695120256591,3143661612445145,
 126375169532421599,5415486851106043649,
 246486713303685957375,11877172892329028459041,
 604107995057426434824791]