A136950 Numbers k such that k and k^2 use only the digits 0, 4, 5, 6 and 9.

0, 64, 640, 6400, 64000, 640000, 6400000, 64000000, 640000000, 6400000000, 64000000000, 640000000000, 6400000000000, 9949906555064, 64000000000000, 99499065550640, 99950460549564, 640000000000000, 969559459994564, 994990655506400, 999504605495640

Offset

1,2

Comments

Generated with DrScheme.

Links

Table of n, a(n) for n=1..21.

J. Wellons, Tables of Shared Digits [archived]

Example

999504605495640^2 = 999009456406994950090059009600.

Crossrefs

Sequence in context: A303265 A138332 A091083 * A136957 A250233 A297666

Adjacent sequences: A136947 A136948 A136949 * A136951 A136952 A136953

Keyword

base,nonn

Author

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

Status

approved