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A100867 Smallest positive integer k such that A000037(n) is not a quadratic residue modulo k. 1
3, 4, 3, 4, 4, 3, 4, 3, 5, 5, 3, 4, 3, 4, 4, 3, 8, 4, 3, 7, 3, 4, 5, 3, 4, 4, 3, 5, 4, 3, 5, 3, 4, 7, 3, 4, 4, 3, 7, 4, 3, 5, 3, 4, 5, 3, 4, 4, 3, 5, 4, 3, 9, 7, 3, 4, 3, 4, 4, 3, 7, 4, 3, 5, 5, 3, 4, 7, 3, 4, 4, 3, 4, 3, 9, 8, 3, 4, 5, 3, 4, 4, 3, 5, 4, 3, 7, 5, 3, 4, 3, 4, 4, 3, 9, 4, 3, 5, 8, 3, 4, 5, 3, 4, 4 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

The non-zero terms of A139401.

FORMULA

a(n) = A139401(A000037(n))

EXAMPLE

a_1=3 because the first nonsquare positive integer is 2 and 2 is not a quadratic residue modulo 3.

CROSSREFS

Sequence in context: A066783 A046536 A052384 * A128200 A061988 A094151

Adjacent sequences:  A100864 A100865 A100866 * A100868 A100869 A100870

KEYWORD

nonn

AUTHOR

Guilherme de Queiroz Hobbs (guilhermehobbs(AT)uol.com.br), Jan 08 2005

EXTENSIONS

Corrected and extended by David Wasserman (dwasserm(AT)earthlink.net), Mar 04 2008

Edited by Max Alekseyev (maxale(AT)gmail.com), May 11 2010

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Last modified February 16 21:51 EST 2012. Contains 205978 sequences.