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 A002942 a(n) = n^2 written backwards. (Formerly M3370 N1357) 11
 1, 4, 9, 61, 52, 63, 94, 46, 18, 1, 121, 441, 961, 691, 522, 652, 982, 423, 163, 4, 144, 484, 925, 675, 526, 676, 927, 487, 148, 9, 169, 4201, 9801, 6511, 5221, 6921, 9631, 4441, 1251, 61, 1861, 4671, 9481, 6391, 5202, 6112, 9022, 4032, 1042, 52, 1062 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = A004086(A000290(n)). - Reinhard Zumkeller, Sep 18 2013 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). LINKS T. D. Noe, Table of n, a(n) for n = 1..1000 EXAMPLE 12*12 = 144, which written backwards is 441, so a(12) = 441. 10*10 = 100, so a(10) = 001 = 1. MAPLE P:=proc(i) local a, b, c, n; for n from 1 by 1 to i do a:=evalf(floor(log10(n^2)+1)); b:=n^2; c:=0; while a>0 do c:=c+(b-(trunc(b/10)*10))*10^(a-1); b:=trunc(b/10); a:=a-1; od; print(c); od; end: P(100); # Paolo P. Lava, Aug 07 2008 MATHEMATICA Table[FromDigits[Reverse[IntegerDigits[n^2]]], {n, 1, 40}] (* Geoffrey Critzer, Dec 04 2011 *) PROG (Haskell) a002942 = a004086 . a000290  -- Reinhard Zumkeller, Sep 18 2013 (MAGMA) [Seqint(Reverse(Intseq(n^2))): n in [1..60]]; // Vincenzo Librandi, Sep 21 2015 CROSSREFS Cf. A000290, A080334. Sequence in context: A309444 A198178 A013571 * A028908 A265148 A220445 Adjacent sequences:  A002939 A002940 A002941 * A002943 A002944 A002945 KEYWORD nonn,base,easy,look AUTHOR EXTENSIONS More terms from Jeremy Gardiner, Sep 08 2002 STATUS approved

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Last modified October 23 05:56 EDT 2019. Contains 328335 sequences. (Running on oeis4.)