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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A137074 Numbers k such that k and k^2 use only the digits 2, 3, 4, 7 and 8. 1
2, 22, 28, 88, 278, 472, 478, 482, 2872, 2878, 4832, 47732, 47778, 47838, 48722, 48872, 272732, 278832, 287878, 887878, 2728338, 2788778, 4844878, 8847838, 27243878, 27244878, 27283472, 27828732, 28782438, 47373872, 47778482, 48344878, 48772778, 88477332, 88728732, 88734372, 273474832, 278284878, 288484372, 477223472, 477372378 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Generated with DrScheme.

LINKS

Jonathan Wellons, Table of n, a(n) for n = 1..169

J. Wellons, Tables of Shared Digits

EXAMPLE

473738734783472^2 = 224428388834244823422724374784.

CROSSREFS

Sequence in context: A057871 A152243 A074160 * A137106 A053962 A111771

Adjacent sequences:  A137071 A137072 A137073 * A137075 A137076 A137077

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 September 20 10:18 EDT 2021. Contains 347584 sequences. (Running on oeis4.)