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 A061363 a(1) = 9; a(n) = least number such that the concatenation a(n)a(n-1)...a(2)a(1) is a square. 4
 9, 4, 18, 167, 2401, 4086461727, 14079962896835441528, 309880704108832516500624685064706000856, 4681896102766617737298881383797502847166028831212571921983062786215145771871779 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE a(3)a(2)a(1) = 1849 = 43^2, a(4)a(3)a(2)a(1) = 1671849 = 1293^2. CROSSREFS Cf. A050638, A050639, A061359, A061361. Sequence in context: A248310 A133597 A075066 * A100077 A317739 A174679 Adjacent sequences:  A061360 A061361 A061362 * A061364 A061365 A061366 KEYWORD nonn,base AUTHOR Amarnath Murthy, Apr 28 2001 EXTENSIONS Corrected by Larry Reeves (larryr(AT)acm.org), May 07 2001 More terms from Ulrich Schimke (ulrschimke(AT)aol.com), Nov 06 2001 STATUS approved

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Last modified December 5 00:21 EST 2021. Contains 349530 sequences. (Running on oeis4.)