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 A062398 #19 Dec 05 2024 17:58:44
%S A062398 1,4,9,10,22,40,88,90,100,103,108,130,144,180,202,207,220,270,301,306,
%T A062398 310,360,400,405,414,441,450,466,504,540,603,630,646,664,702,709,720,
%U A062398 790,801,808,810,880,889,898,900,907,970,988,1000,1003,1008,1012,1017
%N A062398 Numbers such that the product of the digits and the sum of the digits are squares.
%H A062398 Harry J. Smith, <a href="/A062398/b062398.txt">Table of n, a(n) for n = 1..1000</a>
%e A062398 144 belongs to the sequence as sum of digits = 9 and the product of the digits = 16.
%t A062398 pdsdQ[n_]:=Module[{idn=IntegerDigits[n]},IntegerQ[Sqrt[Total[idn]]] && IntegerQ[Sqrt[Times@@idn]]]; Select[Range[1100],pdsdQ] (* _Harvey P. Dale_, Aug 20 2012 *)
%o A062398 (PARI) isok(k)={my(d=digits(k)); issquare(vecsum(d)) && issquare(vecprod(d))} \\ _Harry J. Smith_, Aug 07 2009
%Y A062398 Intersection of A028839 and A174800.
%K A062398 nonn,base,easy
%O A062398 1,2
%A A062398 _Amarnath Murthy_, Jun 28 2001
%E A062398 Corrected and extended by _Erich Friedman_, Jul 02 2001