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A053061 a(n) = 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

Table of n, a(n) for n=1..39.

FORMULA

a(n) = n*(10^floor(2*log10(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 A114167 A108302

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 July 19 11:05 EDT 2019. Contains 325155 sequences. (Running on oeis4.)