Search: id:A081646
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%I A081646
%S A081646 50,53,58,65,74,85,98,99,102,107,114,123,134,147,148,151,156,163,172,
%T A081646 183,197,200,205,212,221,232,245,246,249,254,261,270,281,294,295,298,
%U A081646 303,310,319,330,343,344,347,352,359,368,379,392,393,396,401,408,417
%N A081646 Integers congruent to 0, 1, 4, 9, 16, 25 or 36 (mod 49) which are not 
               squares.
%D A081646 Mark A. Herkommer, Number Theory, A Programmer's Guide, McGraw-Hill, 
               New York, 1999, page 315.
%t A081646 Select[ Range[427], (Mod[ #, 49] == 0 || Mod[ #, 49] == 1 || Mod[ #, 
               49] == 4 || Mod[ #, 49] == 9 || Mod[ #, 49] == 16 || Mod[ #, 49] 
               == 25 || Mod[ #, 49] == 36) && !IntegerQ[ Sqrt[ # ]] & ]
%Y A081646 Sequence in context: A043618 A134691 A139182 this_sequence A052261 A118146 
               A114504
%Y A081646 Adjacent sequences: A081643 A081644 A081645 this_sequence A081647 A081648 
               A081649
%K A081646 easy,nonn
%O A081646 1,1
%A A081646 Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 26 2003

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