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A139180 Smallest number m greater than 1 such that m=(Sum_{i=1..k} d_i!)^n where d_1 d_2 ... d_k is the decimal expansion of m, or 0 if no m exists. 2

%I #2 Mar 30 2012 17:37:44

%S 2,172603687936,3910825640696988096,396867211295273131775761,

%T 13586030059671762261567625351,4218282992523473247642107344280879104,

%U 5572272365289149102816175194628254483025277

%N Smallest number m greater than 1 such that m=(Sum_{i=1..k} d_i!)^n where d_1 d_2 ... d_k is the decimal expansion of m, or 0 if no m exists.

%C A139181(n)=A139180(n)^(1/n).

%e 172603687936=(1!+7!+2!+6!+0!+3!+6!+8!+7!+9!+3!+6!)^2

%Y Cf. A014080, A137604, A137605.

%K base,nonn

%O 1,1

%A _Farideh Firoozbakht_, Apr 22 2008

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Last modified July 9 20:54 EDT 2024. Contains 374191 sequences. (Running on oeis4.)