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A061361
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a(1) = 4; a(n) = least number such that the concatenation a(n)a(n-1)...a(2)a(1) is a square.
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6
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..9.
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EXAMPLE
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a(3)a(2)a(1) = 1764 = 42^2, a(4)a(3)a(2)a(1) = 6041764 = 2458^2, a(5)a(4)a(3)a(2)a(1) = 8584885596126041764 = 2929997542^2.
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CROSSREFS
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Cf. A050636, A050637, A061359, A061363.
Sequence in context: A125691 A211949 A079803 * A113610 A062046 A102020
Adjacent sequences: A061358 A061359 A061360 * A061362 A061363 A061364
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KEYWORD
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nonn,base
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AUTHOR
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Amarnath_murthy (amarnath_murthy(AT)yahoo.com), Apr 28 2001
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EXTENSIONS
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Corrected by Larry Reeves (larryr(AT)acm.org), May 07 2001
More terms from UlrSchimke(AT)aol.com, Nov 06, 2001
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STATUS
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approved
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