This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A291628 #8 Sep 10 2017 02:20:11 %S A291628 6,58,62,63,66,86,94,183,184,186,187,188,192,194,213,244,256,272,294, %T A291628 306,312,583,586,587,588,607,608,612,613,614,616,622,624,628,663,666, %U A291628 688,706,734,744,764,806,812,833,857,874,876,913,914,924,942,1833,1834 %N A291628 Numbers k such that 3 is the smallest decimal digit of k^2. %H A291628 Vincenzo Librandi, <a href="/A291628/b291628.txt">Table of n, a(n) for n = 1..1880</a> %e A291628 58 is in the sequence because 58^2 = 3364, the smallest decimal digit of which is 3. %t A291628 Select[Range[10^4], Min[IntegerDigits[#^2]]==3 &] (* _Vincenzo Librandi_, Sep 10 2017 *) %o A291628 (PARI) select(k->vecmin(digits(k^2))==3, vector(2000, k, k)) %Y A291628 Cf. A291625, A291626, A291627, A291629, A291630, A291631. %K A291628 nonn,base %O A291628 1,1 %A A291628 _Colin Barker_, Aug 28 2017