A136991 Numbers k such that k and k^2 use only the digits 1, 2, 4, 5 and 9.

1, 2, 5, 11, 12, 15, 21, 112, 211, 212, 229, 1515, 4415, 4421, 95512, 119229, 119415, 145415, 221911, 222511, 222515, 222521, 442212, 459521, 491421, 494211, 494421, 494511, 499229, 499521, 1222515, 1245911, 1594415, 2119415, 4942212, 4944211, 4951911, 4955229, 4991515, 4994421, 4995212, 11145511, 11155515, 11925415, 12212511

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..367

J. Wellons, Tables of Shared Digits [archived]

Example

492149521242421^2 = 242211151259144199119449941241.

Crossrefs

Sequence in context: A168453 A136990 A136968 * A136989 A136987 A231336

Adjacent sequences: A136988 A136989 A136990 * A136992 A136993 A136994

Keyword

base,nonn,changed

Author

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

Status

approved