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A132573 as a simple table

na(n)
12
28
3939
421525543
5583800017138353
6389129377207344584150234464055
7322329972486630717438831184068725403247163006781447886216160

[2,8,939,21525543,583800017138353,
 389129377207344584150234464055,
 32232997248663071743883118406872540324716300678144\
 7886216160]