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A097371
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Numbers n such that n=(d_1+5)(d_2+5)*...*(d_k+5) where d_1 d_2 ... d_k is the decimal expansion of n.
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5
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50, 210, 450, 780, 1500, 3920, 16500, 91728, 269500, 493920, 1293600, 266378112, 317447424, 1277337600, 14948388000, 48697248600, 379748636467200
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| All terms are even.
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EXAMPLE
| 317447424 is in the sequence because 317447424=(3+5)(1+5)(7+5)(4+5)(4+5)(7+5)(4+5)(2+5)(4+5).
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MATHEMATICA
| Do[h=IntegerDigits[n]; l=Length[h]; If[n==Product[h[[k]]+5, {k, l}], Print[n]], {n, 800000000}]
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CROSSREFS
| Cf. A097372, A098681.
Sequence in context: A031692 A173141 A115592 * A179755 A186843 A197971
Adjacent sequences: A097368 A097369 A097370 * A097372 A097373 A097374
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KEYWORD
| base,nonn
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AUTHOR
| Farideh Firoozbakht (mymontain(AT)yahoo.com), Sep 20 2004
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EXTENSIONS
| 4 more terms from Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 13 2006
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