A053899 - OEIS

This site is supported by donations to The OEIS Foundation.

A053899

Squares composed of digits {1,4,7}.

1, 4, 144, 441, 1444, 7744, 7447441, 4147177477444, 7174474747441, 1447471174444717444, 117747174771111771147177144441, 7174471471414771441747147717441, 1147111747441771474111741117114417444, 4741471777144414774147714111744447747417744 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`Author?, Source(txt)` `P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences` `H. Mishima, Sporadic tridigital solutions`
	FORMULA	`a(n) = A053898(n)^2`
	CROSSREFS	`Cf. A053898.` `Sequence in context: A048432 A122422 A083688 * A058414 A053891 A053897` `Adjacent sequences: A053896 A053897 A053898 * A053900 A053901 A053902`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.`
	EXTENSIONS	`More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005` `Four more terms from Mishima's webpage added by Max Alekseyev (maxale(AT)gmail.com), Jan 28 2012`

Content is available under The OEIS End-User License Agreement .

Last modified February 13 09:55 EST 2012. Contains 205451 sequences.