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A013632
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nextprime(n)-n.
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12
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2, 1, 1, 2, 1, 2, 1, 4, 3, 2, 1, 2, 1, 4, 3, 2, 1, 2, 1, 4, 3, 2, 1, 6, 5, 4, 3, 2, 1, 2, 1, 6, 5, 4, 3, 2, 1, 4, 3, 2, 1, 2, 1, 4, 3, 2, 1, 6, 5, 4, 3, 2, 1, 6, 5, 4, 3, 2, 1, 2, 1, 6, 5, 4, 3, 2, 1, 4, 3, 2, 1, 2, 1, 6, 5, 4, 3, 2, 1, 4, 3, 2, 1, 6, 5, 4, 3, 2, 1, 8, 7, 6, 5, 4, 3, 2, 1, 4, 3, 2, 1, 2, 1, 4, 3
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Except for a(0) and a(1), a(n) is the least k such that the GCD( n!, n+k) = 1. [From Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 05 2010]
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MAPLE
| [ seq(nextprime(i)-i, i=0..100) ];
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MATHEMATICA
| f[n_] := NextPrime@n - n; Array[f, 105, 0] [From Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 05 2010]
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CROSSREFS
| Sequence in context: A134838 A049843 A131374 * A080121 A122901 A001917
Adjacent sequences: A013629 A013630 A013631 * A013633 A013634 A013635
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Incorrect comment removed by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Mar 18 2010
More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 05 2010
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