A305508 - OEIS

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A305508 as a simple table

n	a(n)
1	0
2	702
3	1722
4	60352
5	855017
6	13419832
7	235231504
8	3907075261
9	64554148567
10	1091758542733
11	18209061707696
12	304661251675492
13	5105283737147602
14	85412880801246839
15	1429775041242612805
16	23935941024217852318

[0,702,1722,60352,855017,13419832,235231504, 3907075261,64554148567,1091758542733, 18209061707696,304661251675492,5105283737147602, 85412880801246839,1429775041242612805, 23935941024217852318]