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A081645 Integers congruent to 0, 1, 4, 9, 16 or 25 (mod 36) which are not squares. 1
37, 40, 45, 52, 61, 72, 73, 76, 88, 97, 108, 109, 112, 117, 124, 133, 145, 148, 153, 160, 180, 181, 184, 189, 205, 216, 217, 220, 232, 241, 252, 253, 261, 268, 277, 288, 292, 297, 304, 313, 325, 328, 333, 340, 349, 360, 364, 369, 376, 385, 396, 397, 405, 412 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Mark A. Herkommer, Number Theory, A Programmer's Guide, McGraw-Hill, New York, 1999, page 315.

LINKS

Table of n, a(n) for n=1..54.

MATHEMATICA

Select[ Range[420], (Mod[ #, 36] == 0 || Mod[ #, 36] == 1 || Mod[ #, 36] == 4 || Mod[ #, 36] == 9 || Mod[ #, 36] == 16 || Mod[ #, 36] == 25) && !IntegerQ[ Sqrt[ # ]] & ]

Select[Range[450], !IntegerQ[Sqrt[#]]&&MemberQ[{0, 1, 4, 9, 16, 25}, Mod[#, 36]] &] (* Harvey P. Dale, Sep 25 2011 *)

CROSSREFS

Sequence in context: A242989 A295801 A111198 * A069963 A071855 A137675

Adjacent sequences:  A081642 A081643 A081644 * A081646 A081647 A081648

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Mar 26 2003

STATUS

approved

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Last modified October 31 05:06 EDT 2020. Contains 338098 sequences. (Running on oeis4.)