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 A382162 #8 Apr 01 2025 03:29:01 %S A382162 0,1,2,5,9,12,18,22,30,39,45,56,68,76,90,99,115,132,143,162,174,195, %T A382162 217,231,255,280,296,323,340,369,399,418,450,483,504,539,561,598,636, %U A382162 660,700,725,767,810,837,882,928,957,1005,1035,1085,1136,1168,1221,1254,1309,1365,1400,1458,1517,1554,1615,1653,1716,1780,1820 %N A382162 Number of pairs (i,j), 1 <= i < j <= n such that A019444(i) < A019444(j). %C A382162 The count of pairs with A019444(i) > A019444(j) gives triangular numbers and is less interesting. %Y A382162 Cf. A019444. %K A382162 nonn %O A382162 1,3 %A A382162 _N. J. A. Sloane_, Mar 31 2025