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A260913 as a simple table

n a(n)
0 1
1 -1
2 -1
3 1
4 30
5 404
6 5379
7 76021
8 1155805
9 18931873
10 333434490
11 6295452542
12 127007655461
13 2729179670279
14 62275740709651
15 1504740573206497
16 38398859322225738
17 1032354879165190692
18 29174916098556605939
19 864859538577015162053
20 26840211278794388530737

[1,-1,-1,1,30,404,5379,76021,1155805,18931873,
 333434490,6295452542,127007655461,2729179670279,
 62275740709651,1504740573206497,38398859322225738,
 1032354879165190692,29174916098556605939,
 864859538577015162053,26840211278794388530737]

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Last modified May 27 02:31 EDT 2022. Contains 354092 sequences. (Running on oeis4.)