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A218029
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Numbers that are equal to the product of the nonzero digits (in base 10) of their square.
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1
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1, 30240, 60480, 51597803520, 687009790646587541893939200, 2639216811747930700939756830720000000, 399953837788563897626396208106026886244605021117749733129069000654848000000000
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OFFSET
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1,2
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LINKS
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EXAMPLE
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For n=30240, n^2 = 914,457,600; the product of the nonzero digits of this square, 9*1*4*4*5*7*6 = 30240 = n.
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CROSSREFS
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Special case of A218013 where the ratio of the digit-product to the original number is 1. Related to A218072.
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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