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Search: id:A002993
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| A002993 |
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Initial digits of squares.
(Formerly M3348)
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+0
11
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| 1, 4, 9, 1, 2, 3, 4, 6, 8, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 5, 5, 6, 6, 7, 7, 8, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4
(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).
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LINKS
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Eric Weisstein's World of Mathematics, Gelfand's Question
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MATHEMATICA
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a[n_]:=First[IntegerDigits[n^2]]; lst={}; Do[AppendTo[lst, a[n]], {n, 0, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 21 2008]
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CROSSREFS
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a(n)=A000030(A000290(n)), A089951, A002994. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 17 2008]
Sequence in context: A135244 A011514 A011238 this_sequence A011290 A129971 A007892
Adjacent sequences: A002990 A002991 A002992 this_sequence A002994 A002995 A002996
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KEYWORD
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nonn,base
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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