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 A079811 #9 Jan 18 2024 18:13:38 %S A079811 1,2,2,6,7,10,10,18,19,24,24,36,37,44,44,60,61,70,70,90,91,102,102, %T A079811 126,127,140,140,168,169,184,184,216,217,234,234,270,271,290,290,330, %U A079811 331,352,352,396,397,420,420,468,469,494,494,546,547,574,574,630,631 %N A079811 Sum of numbers read upward at a 45-degree angle in A079809. %H A079811 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,2,-2,0,0,-1,1). %Y A079811 Cf. A079808, A092542. %Y A079811 The two bisections are A309805 and twice A211538 (with leading zeros dropped). %K A079811 easy,nonn %O A079811 1,2 %A A079811 _Amarnath Murthy_, Feb 10 2003 %E A079811 Terms a(8) and beyond from _Andrey Zabolotskiy_, Jan 18 2024