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A249276 as a simple table

n a(n)
0 -1
1 1
2 1
3 1
4 73
5 11
6 3625
7 5525
8 5233001
9 1212281
10 927777937
11 772193
12 43791735453787
13 6889178449747
14 158996102434867
15 107876982981287
16 782501215247703271
17 6225541612992329
18 235541803917995571502409

[-1,1,1,1,73,11,3625,5525,5233001,1212281,
 927777937,772193,43791735453787,6889178449747,
 158996102434867,107876982981287,
 782501215247703271,6225541612992329,
 235541803917995571502409]

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Last modified August 20 19:51 EDT 2019. Contains 326155 sequences. (Running on oeis4.)