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A089542 as a simple table

n a(n)
1 4
2 4
3 33
4 259
5 3127
6 46661
7 823549
8 16777219
9 387420493
10 10000000003
11 285311670617
12 8916100448287
13 302875106592259
14 11112006825558019
15 437893890380859379
16 18446744073709551617
17 827240261886336764197
18 39346408075296537575443
19 1978419655660313589124007

[4,4,33,259,3127,46661,823549,16777219,387420493,
 10000000003,285311670617,8916100448287,
 302875106592259,11112006825558019,
 437893890380859379,18446744073709551617,
 827240261886336764197,39346408075296537575443,
 1978419655660313589124007]

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Last modified October 23 11:52 EDT 2021. Contains 348212 sequences. (Running on oeis4.)