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Search: id:A081646
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| A081646 |
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Integers congruent to 0, 1, 4, 9, 16, 25 or 36 (mod 49) which are not squares. |
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+0
2
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| 50, 53, 58, 65, 74, 85, 98, 99, 102, 107, 114, 123, 134, 147, 148, 151, 156, 163, 172, 183, 197, 200, 205, 212, 221, 232, 245, 246, 249, 254, 261, 270, 281, 294, 295, 298, 303, 310, 319, 330, 343, 344, 347, 352, 359, 368, 379, 392, 393, 396, 401, 408, 417
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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Mark A. Herkommer, Number Theory, A Programmer's Guide, McGraw-Hill, New York, 1999, page 315.
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MATHEMATICA
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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[ # ]] & ]
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CROSSREFS
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Adjacent sequences: A081643 A081644 A081645 this_sequence A081647 A081648 A081649
Sequence in context: A043618 A134691 A139182 this_sequence A052261 A118146 A114504
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KEYWORD
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easy,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 26 2003
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