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A114260 Numbers n such that the 4th power of n contains exactly 4 copies of each digit of n. 9
5702631489, 7264103985, 7602314895, 7824061395, 8105793624, 8174035962, 8304269175, 8904623175, 8923670541, 9451360827, 9785261403, 9804753612, 9846032571 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms of the sequence are also pandigital, i.e. they contain all the 10 digits once. This is probably accidental, but quite curious.

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

E.g. 5702631489 is in the sequence since its 4th power

1057550783692741389295697108242363408641

contains four 5's, four 7's, four 0's and so on.

MATHEMATICA

t = Select[Permutations[Range[0, 9]], #[[1]] > 0 &]; t2 = Select[t, Union[DigitCount[FromDigits[#]^4]] == {4} &]; FromDigits /@ t2 (* T. D. Noe, Nov 08 2011 *)

CROSSREFS

Cf. A114258, A114259, A114261.

Sequence in context: A213254 A058416 A210013 * A113644 A234059 A032433

Adjacent sequences:  A114257 A114258 A114259 * A114261 A114262 A114263

KEYWORD

base,nonn,full,fini

AUTHOR

Giovanni Resta, Nov 18 2005

STATUS

approved

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Last modified August 19 08:57 EDT 2017. Contains 290794 sequences.