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 A078237 a(1) = 6, a(n+1) = smallest multiple of a(n) using only digits (4,6,8,9,0) and not divisible by 10. 3
 6, 48, 96, 864, 6048, 489888, 460984608, 4880444044896, 6604089990008099904, 6406898466996448048966464, 488494490499084904898890846098449664 (list; graph; refs; listen; history; text; 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 Terms after a(8) have at least 18 digits. - R. J. Mathar, Apr 01 2007 LINKS MAPLE A078237 := proc(nmax) local a, k, anext, baddigs, overl; a := [6] ; baddigs := {1, 2, 3, 5, 7} ; while nops(a) 0) and nops(overl) = 0 then a := [op(a), anext] ; print(a); break ; else k := k+1 ; fi ; od ; od ; RETURN(a) ; end: A078237(20) ; # R. J. Mathar, Apr 01 2007 CROSSREFS Cf. A078236, A078238. Sequence in context: A320403 A323138 A000252 * A274131 A259121 A052651 Adjacent sequences:  A078234 A078235 A078236 * A078238 A078239 A078240 KEYWORD base,more,nonn AUTHOR Amarnath Murthy, Nov 23 2002 EXTENSIONS a(7) from Jonathan Vos Post, Mar 22 2006 a(8) from R. J. Mathar, Apr 01 2007 More terms from Robert Gerbicz, May 09 2008 a(11) from Donovan Johnson, Sep 05 2008 STATUS approved

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Last modified February 22 12:24 EST 2020. Contains 332135 sequences. (Running on oeis4.)