A002440 - OEIS

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A002440

Squares written in base 7.
(Formerly M3431 N1392)

1, 4, 12, 22, 34, 51, 100, 121, 144, 202, 232, 264, 331, 400, 441, 514, 562, 642, 1024, 1111, 1200, 1261, 1354, 1452, 1552, 1654, 2061, 2200, 2311, 2424, 2542, 2662, 3114, 3241, 3400, 3531, 3664, 4132, 4302, 4444, 4621, 5100, 5251, 5434, 5622, 6112, 6304

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Squares in base 10: 1, 4, 100, 121, 144, 400, 441, 1024, 10000, 10201, 10404, 12100, 12321, 12544, 14400, 14641. - Zak Seidov, Apr 18 2014

REFERENCES

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

V. Thébault, Les Récréations Mathématiques. Gauthier-Villars, Paris, 1952, p. 93.

LINKS

Zak Seidov, Table of n, a(n) for n = 1..1000

FORMULA

a(n) = A007093(A000290(n)). - Jason Kimberley, Dec 13 2012

MATHEMATICA

Table[FromDigits[IntegerDigits[n^2, 7]], {n, 100}] (* Zak Seidov, Apr 18 2014 *)

CROSSREFS

Sequence in context: A210639 A301260 A301185 * A301220 A301067 A301181

Adjacent sequences: A002437 A002438 A002439 * A002441 A002442 A002443

KEYWORD

nonn,base,easy

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from James A. Sellers, Sep 08 2000

STATUS

approved