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 A112770 #10 Feb 16 2025 08:32:59
%S A112770 4,10,22,25,34,46,55,58,82,85,94,106,115,118,121,142,145,166,178,187,
%T A112770 202,205,214,226,235,253,262,265,274,289,295,298,319,334,346,355,358,
%U A112770 382,391,394,415,445,451,454,466,478,493,502,505,514,517,526,529,535
%N A112770 Products of pairs of terms from A003627.
%C A112770 It would be incorrect to call these Eisenstein semiprimes. For the Eisenstein primes see A055664. - _N. J. A. Sloane_, Feb 06 2008. For
%D A112770 Conway, J. H. and Guy, R. K., The Book of Numbers. New York: Springer-Verlag, pp. 220-223, 1996.
%D A112770 Wagon, S. "Eisenstein Primes." Section 9.8 in Mathematica in Action. New York: W. H. Freeman, pp. 319-323, 1991.
%H A112770 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/EisensteinInteger.html">Eisenstein Integer.</a>
%H A112770 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/EisensteinPrime.html">Eisenstein Prime.</a>
%H A112770 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Semiprime.html">Semiprime.</a>
%F A112770 {a(n)} = {p*q: p and q both elements of A007645} = {p*q: p and q both of form 3*m^2 * n^2 for integers m, n}.
%Y A112770 Cf. A001358, A003627.
%K A112770 easy,nonn
%O A112770 1,1
%A A112770 _Jonathan Vos Post_ and _Ray Chandler_, Oct 15 2005
%E A112770 Definition corrected by _N. J. A. Sloane_, Feb 06 2008