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 A107620 #8 Mar 30 2012 17:26:16 %S A107620 6,6,15,14,33,26,51,38,69,58,93,74,123,86,141,106,177,122,201,142,219, %T A107620 158,249,178,291,202,309,214,327,226,381,262,411,278,447,302,471,326, %U A107620 501,346,537,362,573,386,591,398,633,446,681,458 %N A107620 Primes multiplied alternately by 3 and 2. %C A107620 Cf. A107621 = primes multiplied alternately by 2 and 3. %F A107620 A107620(n) = prime(n)*(2 + mod(n, 2)). %t A107620 A107620[n_]:= Prime[n] (2 + Mod[n, 2]); Array[A107620, 40] %Y A107620 Cf. A107621. %K A107620 easy,nonn %O A107620 1,1 %A A107620 _Zak Seidov_, May 18 2005