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A128396
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Numbers n such that n^2 divides 16^n-1.
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16
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1, 3, 5, 15, 21, 39, 55, 105, 155, 165, 195, 205, 273, 465, 609, 615, 903, 915, 1155, 1265, 1365, 1705, 2067, 2145, 2255, 2265, 2373, 2667, 3045, 3081, 3255, 3795, 4305, 4515, 4895, 4965, 5115, 6045, 6123, 6355, 6405, 6765, 7077, 7455, 7917, 7995, 10065
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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MATHEMATICA
| Select[Range[11000], Divisible[16^#-1, #^2]&] [from Harvey P. Dale, Dec. 14, 2010]
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CROSSREFS
| Cf. A127103, A127104, A127105, A127106, A127107, A127102, A127101, A127100, A127092, A128405, A128393, A128394, A128396, A128397, A128398, A128399, A128400, A128401, A128402, A128403, A128404.
Sequence in context: A201433 A101129 A177916 * A155173 A202505 A121219
Adjacent sequences: A128393 A128394 A128395 * A128397 A128398 A128399
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KEYWORD
| nonn,less
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 01 2007
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