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A002442 Squares written in base 9.
(Formerly M3377 N1361)
0
1, 4, 10, 17, 27, 40, 54, 71, 100, 121, 144, 170, 207, 237, 270, 314, 351, 400, 441, 484, 540, 587, 647, 710, 764, 831, 1000, 1061, 1134, 1210, 1277, 1357, 1440, 1524, 1611, 1700, 1781, 1874, 2070, 2167, 2267, 2370, 2474, 2581, 2700, 2811, 3024, 3140, 3257 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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. 98.

LINKS

Table of n, a(n) for n=1..49.

FORMULA

a(n) = A007095(A000290(n)). - Jason Kimberley, Dec 13 2012

MATHEMATICA

Table[FromDigits[IntegerDigits[n^2, 9]], {n, 1, 100}] (* Stefan Steinerberger, Apr 11 2006 *)

PROG

(MAGMA) [Seqint(Intseq(n^2, 9)): n in [1..60]]; // Vincenzo Librandi, Oct 16 2015

CROSSREFS

Cf. A000290, A007095.

Sequence in context: A294249 A138105 A213398 * A008022 A213497 A047699

Adjacent sequences:  A002439 A002440 A002441 * A002443 A002444 A002445

KEYWORD

nonn,base,easy

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Stefan Steinerberger, Apr 11 2006

STATUS

approved

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Last modified December 11 05:41 EST 2017. Contains 295868 sequences.