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A116187
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Numbers n such that n concatenated with n+4 gives the product of two numbers which differ by 6.
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8
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12, 43, 20440836, 30017751, 61336887, 52400871197755334426147587, 53651708763838760619655612, 56652002793835820319625612, 57952296063256269823192087, 17684775866714240650923831481623
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Also numbers n such that n concatenated with n+9 gives the product of two numbers which differ by 4. For proof that this is the same sequence compare A116133.
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EXAMPLE
| 61336887//61336891 = 78317867 * 78317873, where // denotes concatenation. 61336887//61336896 = 78317868 * 78317872.
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CROSSREFS
| Cf. A116173, A115429, A116133, A116194, A116318.
Cf. A116193, A116180, A116350.
Sequence in context: A004636 A136279 A012471 * A009790 A009519 A106808
Adjacent sequences: A116184 A116185 A116186 * A116188 A116189 A116190
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KEYWORD
| nonn,base
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AUTHOR
| Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006
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EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), Apr 11 2007
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