A137102 - OEIS

A137102

Numbers k such that k and k^2 use only the digits 2, 4, 6, 7 and 9.

2, 7, 26, 27, 264, 277, 474, 792, 964, 4762, 6926, 22277, 26962, 27924, 49262, 49426, 49474, 49777, 69262, 264474, 269777, 474262, 476962, 494262, 494462, 494464, 497262, 497662, 499474, 692262, 692277, 962924, 972764, 2779262, 4767277, 4769462, 4772277, 4944464, 4946662, 4994777, 4996926, 4996962, 4997262, 4997764, 9729464, 9964674

(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..424

J. Wellons, Tables of Shared Digits [archived]

EXAMPLE

974667496967262^2 = 949976729644427679967499776644.

CROSSREFS

Sequence in context: A323658 A018980 A012990 * A294681 A229241 A335179

Adjacent sequences: A137099 A137100 A137101 * A137103 A137104 A137105

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved