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A087392
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a(1) = 1, a(n) = smallest multiple of n beginning with the digit reversal of a(n-1).
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0
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1, 10, 12, 212, 2120, 2124, 42126, 621240, 421263, 3621240, 4212637, 73621248, 842126376, 67362124802, 2084212637610, 16736212480208, 802084212637617, 7167362124802086, 680208421263761709, 9071673621248020860
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OFFSET
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1,2
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LINKS
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FORMULA
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a(n) = n*ceiling((1/n)*reverse(a(n-1))*10^f(n)) where f(n) starts out practically always 1 or 2 and reaches higher values extremely slowly. - Sam Alexander, Nov 15 2003
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EXAMPLE
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a(6) = 2124; a(7) = 42126, which begins with the digit reversal of 2124.
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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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