A137068 Numbers k such that k and k^2 use only the digits 2, 3, 4, 5 and 7.

2, 5, 235, 2335, 7235, 23335, 72335, 233335, 477235, 2333335, 2354235, 23333335, 47354235, 233333335, 235744235, 273372335, 274477235, 473732335, 723432335, 2333333335, 2333524235, 2733723335, 4747354235, 7372744235, 23333333335, 23333524235, 27472254235, 52224777235, 57223732335, 72334323335, 233333333335, 273372342335

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..63

J. Wellons, Tables of Shared Digits [archived]

Example

52323727254235^2 = 2737772433775574532325435225.

Crossrefs

Sequence in context: A072118 A249180 A135724 * A137066 A175977 A367673

Adjacent sequences: A137065 A137066 A137067 * A137069 A137070 A137071

Keyword

base,nonn

Author

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

Status

approved