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A028734 Nonsquares mod 21. +0
1
2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 17, 19, 20 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Sequence in context: A028374 A050578 A028776 this_sequence A028755 A095976 A024609

Adjacent sequences: A028731 A028732 A028733 this_sequence A028735 A028736 A028737

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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