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A073647 In decimal representation of n, replace composite digits (4, 6, 8 and 9) with their concatenated prime factorizations (22, 23, 222 and 33). 0

%I

%S 1,2,3,22,5,23,7,222,33,10,11,12,13,122,15,123,17,1222,133,20,21,22,

%T 23,222,25,223,27,2222,233,30,31,32,33,322,35,323,37,3222,333,220,221,

%U 222,223,2222,225,2223,227,22222,2233,50,51,52,53,522,55,523,57,5222,533

%N In decimal representation of n, replace composite digits (4, 6, 8 and 9) with their concatenated prime factorizations (22, 23, 222 and 33).

%K nonn,base

%O 1,2

%A _Reinhard Zumkeller_, Aug 29 2002

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Last modified November 22 16:31 EST 2019. Contains 329396 sequences. (Running on oeis4.)