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 A240527 #16 Aug 05 2019 18:20:03
%S A240527 64,95,127,135,143,144,159,160,175,191,192,207,215,216,242,243,272,
%T A240527 279,296,323,335,350,360,368,375,404,405,415,416,431,432,448,455,459,
%U A240527 464,479,485,504,527,528,543,544,559,584,594,615,620,623,647,656,672,719
%N A240527 Indices of 7-almost prime triangular numbers.
%H A240527 Vincenzo Librandi, <a href="/A240527/b240527.txt">Table of n, a(n) for n = 1..1000</a>
%F A240527 { m : A069904(m) = 7 }. - _Alois P. Heinz_, Aug 05 2019
%e A240527 a(1) = 64 because A000217(64) = 64*(64+1)/2 = 2080 = 2^5 * 5 * 13 is a 7-almost prime.
%t A240527 Flatten[Position[Accumulate[Range[800]],_?(PrimeOmega[#]==7&)]]
%Y A240527 Cf. A000217, A069904, A108815, A114435, A114436, A114437, A164977.
%K A240527 nonn
%O A240527 1,1
%A A240527 _Vincenzo Librandi_, Apr 07 2014