A058439 - OEIS

A058439

Numbers k such that k^2 contains only digits {0,4,7}, not ending with zero.

2, 88, 638, 2010988315424552 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..4.` `P. De Geest, Index to related sequences` `Hisanori Mishima, Sporadic tridigital solutions`
	CROSSREFS	`Cf. A058440.` `Sequence in context: A244386 A273520 A066226 * A058463 A166848 A283631` `Adjacent sequences: A058436 A058437 A058438 * A058440 A058441 A058442`
	KEYWORD	`nonn,base,hard,more`
	AUTHOR	`Patrick De Geest, Nov 15 2000`
	STATUS	`approved`

Last modified March 27 20:39 EDT 2023. Contains 361575 sequences. (Running on oeis4.)