A078235 a(1) = 7, a(n+1) = smallest multiple of a(n) using only prime digits(2,3,5,7).

7, 35, 525, 5775, 225225, 27252225, 73553755275, 52377555577572225, 755322332227355227335375375

Offset

1,1

Comments

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

Links

Table of n, a(n) for n=1..9.

Crossrefs

Cf. A078232, A078233, A078234, A078236.

Sequence in context: A073109 A389355 A231511 * A364454 A197555 A362162

Adjacent sequences: A078232 A078233 A078234 * A078236 A078237 A078238

Keyword

base,more,nonn

Author

Amarnath Murthy, Nov 23 2002

Extensions

More terms from Sascha Kurz, Jan 06 2003

a(8) from Ray G. Opao, Mar 30 2005

a(9) from Robert Gerbicz, May 09 2008

Status

approved