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A032743
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Super-2 Numbers (2 x n^2 contains substring '22' in its decimal expansion).
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3
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19, 31, 69, 81, 105, 106, 107, 119, 127, 131, 169, 181, 190, 219, 231, 247, 269, 281, 310, 318, 319, 331, 332, 333, 334, 335, 336, 337, 338, 339, 348, 369, 381, 419, 431, 454, 469, 481, 511, 519, 531, 558, 569, 581, 601, 619, 631, 669, 679, 681, 690, 715
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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REFERENCES
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C. A. Pickover, "Keys to Infinity", New York: Wiley, p. 7, 1995.
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LINKS
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Harvey P. Dale, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Super-d Number.
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MATHEMATICA
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Select[Range[1000], MemberQ[Partition[IntegerDigits[2#^2], 2, 1], {2, 2}]&] (* From Harvey P. Dale, May 09 2012 *)
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CROSSREFS
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Cf. A014569.
Sequence in context: A033212 A141184 A104227 * A106861 A107168 A125602
Adjacent sequences: A032740 A032741 A032742 * A032744 A032745 A032746
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KEYWORD
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nonn,base
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AUTHOR
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Patrick De Geest, May 15 1998.
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STATUS
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approved
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