A132503 - OEIS

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A132503 as a simple table

n	a(n)
1	28
2	1144
3	1784799
4	14258496910867
5	231099489885389310637552280
6	227421277339089144013856519077984575453797747955889134

[28,1144,1784799,14258496910867, 231099489885389310637552280, 22742127733908914401385651907798457545379774795588\ 9134]