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 A053061 a(n) is the decimal concatenation of n and n^2. 9
 11, 24, 39, 416, 525, 636, 749, 864, 981, 10100, 11121, 12144, 13169, 14196, 15225, 16256, 17289, 18324, 19361, 20400, 21441, 22484, 23529, 24576, 25625, 26676, 27729, 28784, 29841, 30900, 31961, 321024, 331089, 341156, 351225, 361296, 371369, 381444, 391521 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES Felice Russo, A set of new Smarandache functions, sequences and conjectures in number theory, American Research Press 2000 LINKS FORMULA a(n) = n*(10^floor(2*log_10(n) + 1) + n). - Henry Bottomley, May 18 2000 a(n) ~ n^3. - Charles R Greathouse IV, Sep 19 2012 MATHEMATICA Table[FromDigits[Join[IntegerDigits[n], IntegerDigits[n^2]]], {n, 40}] (* Harvey P. Dale, May 24 2012 *) PROG (MAGMA) [Seqint(Intseq(n^2) cat Intseq(n)): n in [1..40]]; // Vincenzo Librandi, Jan 03 2015 CROSSREFS Cf. A020338, A055436, A061086, A175605, A253445. Sequence in context: A061043 A098603 A274620 * A055820 A334597 A114167 Adjacent sequences:  A053058 A053059 A053060 * A053062 A053063 A053064 KEYWORD easy,nonn,base AUTHOR Felice Russo, Feb 25 2000 EXTENSIONS More terms from James A. Sellers, Feb 28 2000 STATUS approved

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Last modified August 12 03:34 EDT 2020. Contains 336436 sequences. (Running on oeis4.)