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 A277460 #10 Oct 17 2016 02:19:50 %S A277460 103,388,434,437,528,657,883,1109,1182,1532,1547,1556,1668,1798,1823, %T A277460 1824,1914,1992,2010,2075,2084,2152,2312,2354,2371,2616,2627,2647, %U A277460 2672,3203,3233,3257,3279,3294,3372,3414,3512,3600,3635,3905,3930,3935,4124,4153 %N A277460 Decades with the same semiprime pattern as the previous decade. %F A277460 a(n) = A220063(n)-1. %F A277460 a(n) = A277459(n)+1. %e A277460 a(1)=103 because the decade from 1020 to 1029 has the same semiprime pattern as the decade from 1030 to 1039 (1027 and 1037). %Y A277460 Cf. A220063, A277459. %K A277460 nonn %O A277460 1,1 %A A277460 _Bobby Jacobs_ and _N. J. A. Sloane_, Oct 16 2016