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A078235 a(1) = 7, a(n+1) = smallest multiple of a(n) using only prime digits(2,3,5,7). 3
7, 35, 525, 5775, 225225, 27252225, 73553755275, 52377555577572225, 755322332227355227335375375 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Sequence is infinite - see Comments in A078233. - Fung Cheok Yin (cheokyin_restart(AT)yahoo.com.hk), Sep 02 2006

CROSSREFS

Cf. A078232, A078233, A078234, A078236.

Sequence in context: A165505 A165639 A073109 * A197555 A028389 A041603

Adjacent sequences:  A078232 A078233 A078234 * A078236 A078237 A078238

KEYWORD

base,more,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 23 2002

EXTENSIONS

More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 06 2003

a(8) from Ray G. Opao (1260(AT)email.com), Mar 30 2005

a(9) from Robert Gerbicz (robert.gerbicz(AT)gmail.com), May 09 2008

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Last modified February 16 21:17 EST 2012. Contains 205971 sequences.