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A002993
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Initial digits of squares.
(Formerly M3348)
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11
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0, 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; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| T. D. Noe, Table of n, a(n) for n = 0..1000
Eric Weisstein's World of Mathematics, Gelfand's Question
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MATHEMATICA
| a[n_] := First[IntegerDigits[n^2]]; Table[a[n], {n, 0, 100} [From Vladimir Orlovsky, Dec 21 2008]
First[IntegerDigits[#]]&/@(Range[70]^2) (* From Harvey P. Dale, Feb 09 2011 *)
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CROSSREFS
| a(n)=A000030(A000290(n)), A089951, A002994. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 17 2008]
Sequence in context: A135244 A011514 A011238 * A011290 A196502 A129971
Adjacent sequences: A002990 A002991 A002992 * A002994 A002995 A002996
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KEYWORD
| nonn,base
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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