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Search: id:A002942
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| A002942 |
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Squares written backwards.
(Formerly M3370 N1357)
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+0
6
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| 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; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
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EXAMPLE
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For example, 12*12 = 144, which written backwards is 441, so a(12) = 441. 10*10 = 100, so a(10) = 001 = 1.
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MAPLE
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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); [From Paolo P. Lava (ppl(AT)spl.at), Aug 07 2008]
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CROSSREFS
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Cf. A000290, A080334.
Sequence in context: A152284 A109717 A013571 this_sequence A028908 A073658 A059479
Adjacent sequences: A002939 A002940 A002941 this_sequence A002943 A002944 A002945
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KEYWORD
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nonn,base,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), Sep 08 2002
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