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0, 0, 0, 1, 0, 1, 3, 1, 0, 0, 5, 0, 1, 3, 9, 2, 1, 0, 3, 11, 1, 5, 3, 4, 0, 15, 1, 2, 17, 3, 0, 5, 9, 3, 21, 1, 5, 8, 3, 11, 1, 5, 27, 10, 3, 0, 29, 0, 5, 0, 9, 2, 15, 5, 1, 4, 35, 3, 17, 14, 11, 3, 1, 39, 5, 0, 16, 41, 2, 9, 3, 21, 45, 4, 1, 5, 9, 3, 15, 20, 11, 51, 1, 9, 5, 2, 17, 27, 11, 57, 3, 9, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,7
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COMMENTS
| The union of A115090 is the complement of A007921: numbers that are not the difference of two primes. - Robert G. Wilson v (rgwv(at)rgwv.com), Mar 09 2006
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EXAMPLE
| 12, the 4th non-squarefree positive integer, is 2^2 * 3. 3 is the largest prime dividing 12. 2 is the smallest prime dividing 12. So a(4) = 3 - 2 = 1.
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MATHEMATICA
| Needs["NumberTheory`NumberTheoryFunctions`"]; (Max@# - Min@#) & /@ (First /@ FactorInteger@# & /@ Select[ Range@243, !SquareFreeQ@# &]) - Robert G. Wilson v (rgwv(at)rgwv.com), Mar 09 2006
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CROSSREFS
| Cf. A117183, A115074.
Sequence in context: A059202 A144452 A058865 * A112295 A110517 A091925
Adjacent sequences: A115087 A115088 A115089 * A115091 A115092 A115093
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Mar 01 2006
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Mar 09 2006
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