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A135629
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Perfect numbers plus 1.
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1
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7, 29, 497, 8129, 33550337, 8589869057, 137438691329, 2305843008139952129, 2658455991569831744654692615953842177, 191561942608236107294793378084303638130997321548169217
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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(# (# + 1))/2 & /@ Select[2^Range[100] - 1, PrimeQ] + 1 (* G. C. Greubel, Oct 24 2016, based on Harvey P. Dale code from A000396 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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