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A068075
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Lesser of a primitive pair such that n and its 10's complement are simultaneously square.
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1
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OFFSET
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1,2
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COMMENTS
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If k is in the sequence so is k * 100^m.
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LINKS
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Table of n, a(n) for n=1..10.
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MATHEMATICA
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Do[ If[n^2 <= 5*10^Floor[ Log[10, n^2]] && IntegerQ[ Sqrt[ 10^Floor[ Log[10, n^2] + 1] - n^2]] && Take[ IntegerDigits[n^2], -1] != {0}, Print[n^2]], {n, 1, 4*10^6}]
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CROSSREFS
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Cf. A068810.
Sequence in context: A213124 A067473 A223299 * A219004 A053136 A000821
Adjacent sequences: A068072 A068073 A068074 * A068076 A068077 A068078
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KEYWORD
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base,nonn
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AUTHOR
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Robert G. Wilson v, Mar 20 2002
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STATUS
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approved
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