OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
Prime 227 is in sequence because 2*2*7=28, 2*8=16, 1*6=6.
MATHEMATICA
dr6Q[n_]:=NestWhile[Times@@IntegerDigits[#]&, n, #>9&]==6; Select[ Prime[ Range[ 400]], dr6Q] (* Harvey P. Dale, Jun 16 2016 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Jaroslav Krizek, Nov 25 2011
STATUS
approved