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 A226175 #9 Feb 20 2022 15:12:08 %S A226175 1,3,5,9,11,19,21,31,37,51,53,79,81,105,121,153,155,207,209,267,293, %T A226175 349,351,453,465,549,587,699,701,875,877,1031,1089,1247,1279,1547, %U A226175 1549,1761,1847,2137,2139,2529,2531,2887,3041,3395,3397,3973,3995,4501 %N A226175 a(n) = A068336(n+1) - 1. %C A226175 Row sums of triangle A160183. %C A226175 Equals M * V, where M = A051731, the inverse Mobius transform and V = A068336: (1, 2, 4, 6, 10, 12, ...). %F A226175 a(n) = A068336(n+1) - 1 %e A226175 a(6) = 19 = A068336(7) - 1 = (20 - 1). %e A226175 a(6) = 19 = (1, 1, 1, 0, 0, 1) dot (1, 2, 4, 6, 10, 12) = (1 + 2 + 4 + 0 + 0 + 12); where (1, 1, 1, 0, 0, 1) = row 6 of triangle A051731. %Y A226175 Cf. A068336 (Mobius transform), A160183, A051731, A054525. %K A226175 nonn %O A226175 1,2 %A A226175 _Gary W. Adamson_, May 29 2013