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A257123 Numbers n such that the decimal expansions of both n and n^2 have 2 as smallest digit and 7 as largest digit. 10
275, 2574, 2725, 2765, 4762, 5725, 6762, 7244, 7262, 23765, 25744, 27244, 27325, 27434, 27465, 27525, 27632, 27665, 47725, 52275, 52376, 52475, 52576, 52675, 57242, 67426, 72266, 72275, 72424, 72426, 72576, 72624, 73325, 73725, 74326, 75725, 233725, 233744 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
PROG
(PARI) is(n) = vecmin(digits(n))==2 && vecmin(digits(n^2))==2 && vecmax(digits(n))==7 && vecmax(digits(n^2))==7
CROSSREFS
Sequence in context: A063368 A028531 A028533 * A130292 A133536 A224109
KEYWORD
nonn,base
AUTHOR
Felix Fröhlich, Apr 25 2015
STATUS
approved

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Last modified April 17 08:54 EDT 2024. Contains 371763 sequences. (Running on oeis4.)