A137001 - OEIS

A137001

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

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`

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