Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #9 Jan 18 2024 18:13:38
%S 1,2,2,6,7,10,10,18,19,24,24,36,37,44,44,60,61,70,70,90,91,102,102,
%T 126,127,140,140,168,169,184,184,216,217,234,234,270,271,290,290,330,
%U 331,352,352,396,397,420,420,468,469,494,494,546,547,574,574,630,631
%N Sum of numbers read upward at a 45-degree angle in A079809.
%H <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 Cf. A079808, A092542.
%Y The two bisections are A309805 and twice A211538 (with leading zeros dropped).
%K easy,nonn
%O 1,2
%A _Amarnath Murthy_, Feb 10 2003
%E Terms a(8) and beyond from _Andrey Zabolotskiy_, Jan 18 2024