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 A090001 Length of longest contiguous block of 1's in binary expansion of n^2. 7
 0, 1, 1, 1, 1, 2, 1, 2, 1, 1, 2, 4, 1, 1, 2, 3, 1, 1, 1, 2, 2, 3, 4, 1, 1, 3, 1, 2, 2, 2, 3, 4, 1, 1, 1, 2, 1, 2, 2, 5, 2, 2, 3, 3, 4, 6, 1, 1, 1, 2, 3, 1, 1, 5, 2, 4, 2, 2, 2, 2, 3, 3, 4, 5, 1, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 6, 2, 3, 5, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 6, 2, 1, 3, 1, 2, 1, 2, 2, 2, 3, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 COMMENTS a(n) = A038374(A000290(n)). LINKS Harvey P. Dale, Table of n, a(n) for n = 0..1000 MATHEMATICA Join[{0}, Table[Max[Length/@Select[Split[IntegerDigits[n^2, 2]], MemberQ[ #, 1]&]], {n, 110}]] (* Harvey P. Dale, Nov 28 2014 *) CROSSREFS Cf. A000120, A090003, A090002, A090000, A089998, A090047. Sequence in context: A205781 A280444 A030422 * A269329 A117166 A078996 Adjacent sequences:  A089998 A089999 A090000 * A090002 A090003 A090004 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Nov 20 2003 STATUS approved

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Last modified May 26 19:44 EDT 2019. Contains 323597 sequences. (Running on oeis4.)