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Search: id:A111443
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| A111443 |
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Least square beginning with the digit reversal of n^2. |
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+0
1
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| 1, 4, 9, 61009, 529, 63001, 9409, 4624, 1849, 1, 121, 441, 961, 69169, 522729, 652864, 982081, 423801, 16384, 4, 144, 484, 925444, 675684, 5262436, 676, 927369, 487204, 14884, 9, 169, 42016324, 9801, 651117289, 5221225, 692110864, 96314596
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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a(10n) = a(n). a(10^n) = 1. a(k) = k^2 if k^2 is a palindromic square. (Comment corrected by David Wasserman (dwasserm(AT)earthlink.net), Jan 21 2009)
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FORMULA
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a(n) = A018796(A004086(n^2)). [From David Wasserman (dwasserm(AT)earthlink.net), Jan 21 2009]
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EXAMPLE
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a(8) = 4624 = 68^2 beginning with 46 the digit reversal of 64 = 8^2.
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CROSSREFS
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Sequence in context: A027522 A028869 A073172 this_sequence A051499 A008345 A016488
Adjacent sequences: A111440 A111441 A111442 this_sequence A111444 A111445 A111446
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KEYWORD
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base,easy,less,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 03 2005
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EXTENSIONS
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Corrected and extended by David Wasserman (dwasserm(AT)earthlink.net), Jan 21 2009
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