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A215677 as a simple table

n a(n)
0 1
1 -1
2 -1
3 44
4 -211
5 -9136
6 118799
7 9894884
8 -368001271
9 -3949758496
10 -1062959453221
11 352302017500124
12 -54987975498787651
13 11177493084346370144
14 -3145848334837840227961
15 988952736939184411495964
16 -349477151478120199840810351
17 141758901275895434356815281984

[1,-1,-1,44,-211,-9136,118799,9894884,-368001271,
 -3949758496,-1062959453221,352302017500124,
 -54987975498787651,11177493084346370144,
 -3145848334837840227961,988952736939184411495964,
 -349477151478120199840810351,
 141758901275895434356815281984]

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)