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A130868 Numbers n such that the set of integer digits of n^2 is the same as of (n+1)^2. 0
13, 157, 436, 515, 847, 863, 900, 913, 987, 992, 1010, 1100, 1213, 1350, 1358, 1686, 1784, 2015, 2183, 2263, 2313, 2342, 2597, 2778, 3186, 3279, 3347, 3486, 3536, 3592, 3649, 3779, 3899, 3909, 3913, 3971, 3986, 4012, 4099, 4248, 4284, 4286, 4291, 4412 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..44.

EXAMPLE

436^2 = 190096 and 437^2 = 190969 consist of the same digits (might have different multiplicities)

MATHEMATICA

Select[Range[10000], Union[IntegerDigits[ #^2]] == Union[IntegerDigits[(# + 1)^2]] &]

CROSSREFS

The sequence A072841 (Integer digits of n^2 are exactly the same (albeit in different order) as the integer digits of (n+1)^2.) is a subsequence of this sequence.

Sequence in context: A250210 A142104 A140020 * A154414 A164623 A072841

Adjacent sequences:  A130865 A130866 A130867 * A130869 A130870 A130871

KEYWORD

base,nonn

AUTHOR

Tanya Khovanova, Jul 23 2007

STATUS

approved

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Last modified May 23 02:46 EDT 2017. Contains 286909 sequences.