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Search: id:A134844
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| A134844 |
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Numbers n such that n contains no 0 but n^2 does contain a 0. |
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+0
13
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| 32, 33, 45, 47, 48, 49, 51, 52, 53, 55, 64, 71, 78, 84, 95, 97, 98, 99, 138, 142, 143, 144, 145, 147, 148, 149, 151, 152, 153, 155, 174, 175, 176, 179, 195, 197, 198, 199, 217, 224, 225, 226, 241, 243, 245, 246, 247, 248, 249, 251, 252, 253, 255, 257, 259, 265
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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J. Browkin, Groebner basis.
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EXAMPLE
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a(1)=32 because 1024=32^2
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MATHEMATICA
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a = {}; Do[Do[Do[k = 100s + 10n + m; w = IntegerDigits[k^2]; If[MemberQ[w, 0], AppendTo[a, k]], {n, 1, 9}], {m, 1, 9}], {s, 0, 9}]; Union[a]
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CROSSREFS
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Cf. A134843, A134845.
Sequence in context: A085259 A054032 A134843 this_sequence A022402 A067010 A029925
Adjacent sequences: A134841 A134842 A134843 this_sequence A134845 A134846 A134847
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KEYWORD
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nonn,base
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Nov 13 2007
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