login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A137100 Numbers n such that n and the square of n use only the digits 2, 4, 6 and 7. 0
2, 26, 474, 4762 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Generated with DrScheme

No additional terms through 7777777777. - Harvey P. Dale, Dec 08 2015

LINKS

Table of n, a(n) for n=1..4.

J. Wellons, Tables of Shared Digits

EXAMPLE

4762^2 = 22676644

MATHEMATICA

With[{c={2, 4, 6, 7}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 5}]], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Dec 08 2015 *)

CROSSREFS

Sequence in context: A057351 A245999 A285026 * A228411 A216254 A177316

Adjacent sequences:  A137097 A137098 A137099 * A137101 A137102 A137103

KEYWORD

base,nonn

AUTHOR

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 19 04:09 EST 2020. Contains 331031 sequences. (Running on oeis4.)