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A099442 as a simple table

n a(n)
1 4
2 26
3 57
4 247
5 502
6 4083
7 1073741793
8 4294967263
9 8589934558
10 70368744177617
11 4503599627370443
12 4611686018427387841
13 18889465931478580854709
14 75557863725914323419059
15 77371252455336267181195177
16 316912650057057350374175801245

[4,26,57,247,502,4083,1073741793,4294967263,
 8589934558,70368744177617,4503599627370443,
 4611686018427387841,18889465931478580854709,
 75557863725914323419059,
 77371252455336267181195177,
 316912650057057350374175801245]

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Last modified September 16 21:28 EDT 2021. Contains 347473 sequences. (Running on oeis4.)