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A239212 Numbers n such that n^2 is divisible by each of its nonzero digits. 4

%I

%S 1,2,3,6,10,12,18,20,28,30,32,36,38,42,48,50,54,60,96,100,102,108,110,

%T 114,120,138,150,156,162,168,180,192,198,200,204,210,220,264,280,288,

%U 300,306,318,320,332,336,338,342,348,350,360,372,380,390,402,408

%N Numbers n such that n^2 is divisible by each of its nonzero digits.

%H Colin Barker, <a href="/A239212/b239212.txt">Table of n, a(n) for n = 1..1000</a>

%e 198 is in the sequence because 198^2 = 39204 which is divisible by 3, 9, 2 and 4.

%o (PARI) isOK(n) = my(v=vecsort(digits(n^2), , 8)); for(i=1+(v[1]==0), #v, if(n^2%v[i], return(0))); 1

%o s=[]; for(n=1, 1000, if(isOK(n), s=concat(s, n))); s

%Y Cf. A239210, A239211, A239213.

%K nonn,base

%O 1,2

%A _Colin Barker_, Mar 12 2014

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Last modified September 16 23:53 EDT 2021. Contains 347477 sequences. (Running on oeis4.)