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A032743 Super-2 Numbers (2 x n^2 contains substring '22' in its decimal expansion). 3
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)
OFFSET

1,1

REFERENCES

C. A. Pickover, "Keys to Infinity", New York: Wiley, p. 7, 1995.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Eric Weisstein's World of Mathematics, Super-d Number.

MATHEMATICA

Select[Range[1000], MemberQ[Partition[IntegerDigits[2#^2], 2, 1], {2, 2}]&] (* Harvey P. Dale, May 09 2012 *)

CROSSREFS

Cf. A014569.

Sequence in context: A141184 A033212 A104227 * A106861 A107168 A243450

Adjacent sequences:  A032740 A032741 A032742 * A032744 A032745 A032746

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998.

STATUS

approved

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Last modified November 24 10:09 EST 2014. Contains 249882 sequences.