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 A325152 #29 Aug 06 2019 10:09:45 %S A325152 0,1,2,3,4,5,6,7,8,9,10,11,20,22,30,33,40,44,50,55,60,66,70,77,80,88, %T A325152 90,99,100,101,110,111,121,131,141,151,161,171,181,191,200,202,212, %U A325152 220,222,232,242,252,262,272,282,292,300,303,313,323,330,333,343,353,363,373,383,393,400,403,404,414,424,434 %N A325152 Numbers whose squares can be expressed as the product of a number and its reversal. %C A325152 The corresponding squares are in A325148 and the numbers k such that k * rev(k) is a square are in A306273. %C A325152 The squares of the first 47 terms of this sequence (from 0 to 242) can be expressed as the product of a number and its reversal in only one way; then a(48) = 252 and 252^2 = 252 * 252 = 144 * 441. %C A325152 The first 65 terms of this sequence (from 0 to 400) are exactly the first 65 terms of A061917; then a(66) = 403, non-palindrome, is the first term of the sequence A325151. %F A325152 a(n) = sqrt(A325148(n)). %e A325152 One way: 20^2 = 400 = 200 * 2. %e A325152 Two ways: 2772^2 = 7683984 = 2772 * 2772 = 1584 * 4851. %e A325152 Three ways: 2520^2 = 14400 * 441 = 25200 * 252 = 44100 * 144. %e A325152 403 is a member since 403^2 = 162409 = 169*961 (note that 403 is not a member of A281625). %Y A325152 Cf. A325148, A325149, A083408, A325150, A307019. %Y A325152 Cf. also A061917, A325151. %Y A325152 Similar to but different from A281625. %K A325152 nonn,base %O A325152 1,3 %A A325152 _Bernard Schott_, Apr 11 2019