A156372 - OEIS

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A156372 as a simple table

n	a(n)
0	1
1	30
2	225
3	13500
4	50625
5	1518750
6	11390625
7	1366875000
8	2562890625
9	76886718750
10	576650390625
11	34599023437500
12	129746337890625
13	3892390136718750
14	29192926025390625
15	7006302246093750000

[1,30,225,13500,50625,1518750,11390625,1366875000, 2562890625,76886718750,576650390625, 34599023437500,129746337890625,3892390136718750, 29192926025390625,7006302246093750000]