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A087486 Numbers n such that digital sum of n divides digital sum of n-th prime, p(n). 0

%I #13 Jul 27 2013 12:50:45

%S 1,10,11,20,22,32,52,56,88,100,101,104,125,160,175,176,182,200,212,

%T 218,223,227,248,262,263,293,295,323,331,338,341,362,377,386,394,397,

%U 398,409,410,439,442,446,457,481,499,508,521,526,533,563,571,595,599,611

%N Numbers n such that digital sum of n divides digital sum of n-th prime, p(n).

%e 52 is in the sequence because prime(52)=239 and 5+2=7 divides 2+3+9=14.

%o (PARI) sod(n) = {digs = digits(n, 10); return (sum(j=1, #digs, digs[j]));}

%o isok(n) = (sod(prime(n)) % sod(n) == 0) \\ _Michel Marcus_, Jul 27 2013

%Y Cf. A007605, A007953.

%K nonn,base

%O 1,2

%A _Lekraj Beedassy_, Oct 23 2003

%E More terms from _Ray Chandler_, Oct 25 2003

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Last modified June 7 10:09 EDT 2024. Contains 373162 sequences. (Running on oeis4.)