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A076386 Numbers n such that sum of digits in base 8 is a divisor of sum of prime divisors (A008472). 1

%I #7 Mar 02 2015 16:08:49

%S 2,3,5,7,8,12,15,16,26,49,64,65,70,86,96,102,123,128,130,140,150,156,

%T 201,208,209,215,225,247,258,266,280,286,299,305,326,350,356,360,403,

%U 424,456,471,474,490,495,512,513,515,519,520,530,532,545,551,555,558

%N Numbers n such that sum of digits in base 8 is a divisor of sum of prime divisors (A008472).

%p A076386 := proc(n) local i,j,t,t1, sod, sopd; t := NULL; for i from 2 to n do t1 := i; sod := 0; while t1 <> 0 do sod := sod + (t1 mod 8); t1 := floor(t1/8); od; sopd := 0; j := 1; while ithprime(j) <= i do if i mod ithprime(j) = 0 then sopd := sopd+ithprime(j); fi; j := j+1; od; if sopd mod sod = 0 then t := t,i; fi; od; t; end;

%Y Cf. A075657, A076380 - A076387.

%K nonn,base

%O 1,1

%A _Floor van Lamoen_, Oct 08 2002

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Last modified April 24 13:24 EDT 2024. Contains 371955 sequences. (Running on oeis4.)