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A218238 as a simple table

n a(n)
1 15
2 255
3 4095
4 65535
5 1048545
6 16776705
7 268427265
8 4294836225
9 68717379375
10 1099478066175
11 17591648997375
12 281466382974975
13 4503462111871425
14 72055393538292225
15 1152886292586266625
16 18446180616957722625

[15,255,4095,65535,1048545,16776705,268427265,
 4294836225,68717379375,1099478066175,
 17591648997375,281466382974975,4503462111871425,
 72055393538292225,1152886292586266625,
 18446180616957722625]

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Last modified April 25 10:51 EDT 2024. Contains 371967 sequences. (Running on oeis4.)