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A137001 Numbers k such that k and k^2 use only the digits 1, 2, 4 and 9. 0
1, 2, 11, 12, 21, 212, 221911 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Generated with DrScheme.

LINKS

Table of n, a(n) for n=1..7.

J. Wellons, Tables of Shared Digits

EXAMPLE

221911^2 = 49244491921.

CROSSREFS

Sequence in context: A136970 A136967 A213975 * A136996 A238109 A113720

Adjacent sequences:  A136998 A136999 A137000 * A137002 A137003 A137004

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified May 22 22:13 EDT 2022. Contains 353959 sequences. (Running on oeis4.)