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%I #7 Oct 27 2019 00:29:46
%S 16,24,42,60,61,67,76,89,98,124,134,135,142,143,153,204,214,227,240,
%T 241,246,264,272,277,299,304,305,314,315,339,340,341,347,350,351,357,
%U 374,375,393,402,403,412,413,420,421,426,430,431,437,455,462,473,503
%N Numbers such that 4 steps are needed to reach a prime under "Sum of digits raised to its digits' powers" procedure.
%Y Cf. A046431.
%K nonn,base
%O 1,1
%A _Patrick De Geest_, Jul 15 1998
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