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A059744
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Numbers n such that n^2 is a palindromic square of sporadic type.
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6
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26, 264, 307, 836, 2285, 2636, 22865, 24846, 30693, 798644, 1042151, 1270869, 2012748, 2294675, 3069307, 11129361, 12028229, 12866669, 30001253, 64030648, 306930693, 2062386218, 2481623254, 10106064399, 10207355549
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OFFSET
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1,1
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REFERENCES
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C. Ashbacher, "More on Palindromic Squares," Journal of Recreational Mathematics, 22:2, pp. 133-135, 1990.
J. K. R. Barnett, "Tables of Square Palindromes in Bases 2 and 10," Journal of Recreational Mathematics, 23:1, pp. 13-18, 1991.
J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 26, pp 10, Ellipses, Paris 2008.
M. Keith, "Classification and Enumeration of Palindromic Squares," Journal of Recreational Mathematics, 22:2, pp. 124-132, 1990.
R. Ondrejka, "A Palindrome (151) of Palindromic Squares," Journal of Recreational Mathematics, 20:1, pp. 68-71, 1988.
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LINKS
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Table of n, a(n) for n=1..25.
W. R. Marshall, Table up to 10^40 Link is broken
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MATHEMATICA
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palQ[n_] := Block[{idn = IntegerDigits@n}, idn == Reverse@idn]; Select[ Range[10^6], ! palQ@# && palQ[#^2] &]
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CROSSREFS
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Cf. A059745, A016106, A028818.
Sequence in context: A136922 A136921 A042308 * A016106 A200041 A092723
Adjacent sequences: A059741 A059742 A059743 * A059745 A059746 A059747
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KEYWORD
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nonn,base
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AUTHOR
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N. J. A. Sloane, Feb 21 2001
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STATUS
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approved
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