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 A002442 Squares written in base 9. (Formerly M3377 N1361) 1
 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 Robert Israel, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A007095(A000290(n)). - Jason Kimberley, Dec 13 2012 MAPLE f:= proc(n) local L, i;   L:= convert(n^2, base, 9);   add(L[i]*10^(i-1), i=1..nops(L)) end proc: map(f, [\$1..100]); # Robert Israel, Aug 12 2018 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 (PARI) a(n) = fromdigits(digits(n^2, 9)); \\ Michel Marcus, Aug 13 2018 CROSSREFS Cf. A000290, A007095. Sequence in context: A294249 A138105 A213398 * A301253 A301195 A008022 Adjacent sequences:  A002439 A002440 A002441 * A002443 A002444 A002445 KEYWORD nonn,base,easy AUTHOR EXTENSIONS More terms from Stefan Steinerberger, Apr 11 2006 STATUS approved

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Last modified October 17 06:08 EDT 2019. Contains 328106 sequences. (Running on oeis4.)