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A012617 as a simple table

na(n)
12
24
3-130
4-6232
5-32102
618014060
72634330582
8-33133771824
9-37925465839182
10-16267772522154668
112012491810909723310
1252146402203293345912
13867090565519403243923786
14-388470254962420081890970180
15207203200777273698360429465094

[2,4,-130,-6232,-32102,18014060,2634330582,
 -33133771824,-37925465839182,-16267772522154668,
 2012491810909723310,52146402203293345912,
 867090565519403243923786,
 -388470254962420081890970180,
 207203200777273698360429465094]