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 A037092 #12 Apr 10 2025 06:49:05 %S A037092 0,7,35,104,238,482,851,1402,2147,3179,4497,6210,8324,10921,14048, %T A037092 17759,22146,27247,33158,39953,47652,56372,66135,77187,89351,102902, %U A037092 117801,134252,152148,171853,193328,216471,241557,268780,298017,329515 %N A037092 Number of triples {i,j,k}, i>1, j>1, k>1, such that i*j*k < n^3. %F A037092 a(n) = Sum_{i=2..n-1} Sum_{j=i..floor(sqrt((n^3-1)/i))} (floor((n^3-1)/(i*j))-j+1). %e A037092 a(3) = 7 because the only triples i*j*k < 27 are (2,2,2) (2,2,3) (2,2,4) (2,2,5) (2,2,6) (2,3,3) (2,3,4). %o A037092 (PARI) a(n) = sum(i = 2, n-1, sum(j = i, sqrtint((n^3-1)/i), floor((n^3-1)/(i*j))-j+1)); \\ _Michel Marcus_, Sep 02 2013 %Y A037092 Cf. A037048. %K A037092 nonn %O A037092 2,2 %A A037092 Joe K. Crump (joecr(AT)carolina.rr.com)