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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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6
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50, 210, 450, 780, 1500, 3920, 16500, 91728, 269500, 493920, 1293600, 266378112, 317447424, 1277337600, 14948388000, 48697248600, 379748636467200
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OFFSET
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1,1
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COMMENTS
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All terms are even.
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LINKS
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EXAMPLE
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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
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Do[h=IntegerDigits[n]; l=Length[h]; If[n==Product[h[[k]]+5, {k, l}], Print[n]], {n, 800000000}]
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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