A136867 Numbers k such that k and k^2 use only the digits 0, 1, 4, 8 and 9.

0, 1, 9, 10, 90, 99, 100, 109, 141, 441, 900, 901, 990, 999, 1000, 1009, 1049, 1090, 1191, 1410, 4410, 9000, 9001, 9010, 9049, 9900, 9990, 9999, 10000, 10009, 10090, 10099, 10401, 10441, 10488, 10490, 10900, 11910, 14100, 44100, 90000, 90001, 90010, 90100, 90490, 90498, 99000, 99001, 99900, 99990, 99999, 100000, 100009, 100090, 100099, 100491

Offset

1,3

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1132

J. Wellons, Tables of Shared Digits [archived]

Example

91919010109^2 = 8449104419418444191881.

Crossrefs

Sequence in context: A041176 A119072 A347183 * A136879 A136880 A136874

Adjacent sequences: A136864 A136865 A136866 * A136868 A136869 A136870

Keyword

base,nonn,changed

Author

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

Status

approved