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 A343895 #16 May 20 2021 12:48:22 %S A343895 13,37,47,71,73,107,121,143,177,181,183,191,239,241,249,253,291,299, %T A343895 337,347,359,409,421,429,431,433,491,517,503,529,537,541,563,579,587, %U A343895 649,659,661,671,743,753,759,767,769,781,789,793,831,851,897,863,913,923,933,937,947,971,1033 %N A343895 Perimeters of integer-sided primitive triangles (a, b, c) where side a is the harmonic mean of the two other sides b and c, i.e., 2/a = 1/b + 1/c with b < a. %C A343895 This sequence is the list of ordered terms of A343894, which is not monotonic. %C A343895 It first differs from A343894 at index 9 where a(9) = 177 while A343894(9) = 183. %C A343895 Like A343894, all terms are odd. %C A343895 For the corresponding primitive triples and miscellaneous properties and references, see A343891. %e A343895 a(2) = 12 + 10 + 15 = 37, because the second largest perimeter corresponds to triple (12, 10, 15) with relations 2/12 = 1/10 + 1/15 and 15 - 10 < 12 < 15 + 10. %Y A343895 Cf. A343894. %Y A343895 Cf. A343891, A343892, A343893. %Y A343895 Cf. A020883 (sides a), A020886 (sides c), A020890 (sides b). %K A343895 nonn %O A343895 1,1 %A A343895 _Bernard Schott_, May 18 2021