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A002440 Squares written in base 7.
(Formerly M3431 N1392)
1
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: A047956 A171762 A210639 * A024987 A008210 A057320

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

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Last modified December 12 01:08 EST 2017. Contains 295936 sequences.