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A117281
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Palindromes whose squares belong to A066531.
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7
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252, 2772, 20502, 23632, 25452, 26962, 27972, 48384, 225522, 252252, 259952, 279972, 619916, 1113111, 1226221, 1357531, 2005002, 2070702, 2126212, 2150512, 2216122, 2226222, 2249422, 2275722, 2316132, 2347432, 2386832, 2429242
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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a(n)^2 = A083408(k) for some k.
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LINKS
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Chai Wah Wu, Table of n, a(n) for n = 1..4679 (n = 1..54 from Hans Havermann)
Shyam Sunder Gupta, EPRNs
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EXAMPLE
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27972 is in the sequence because 782432784 = 27972*27972 = 15984*48951.
1113111 is in the sequence because 1239016098321 = 1113111*1113111 = 1022121*1212201.
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CROSSREFS
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Cf. A066531, A083408 (square EPRNs), A206642.
Sequence in context: A154073 A166783 A104679 * A152466 A004535 A027815
Adjacent sequences: A117278 A117279 A117280 * A117282 A117283 A117284
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KEYWORD
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nonn,base
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AUTHOR
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Lekraj Beedassy, Apr 23 2006
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EXTENSIONS
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Edited and corrected by Klaus Brockhaus, Aug 21 2007
Edited by N. J. A. Sloane, Aug 01 2019
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STATUS
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approved
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