reinhard.zumkeller at gmail.com (Reinhard Zumkeller) writes: > > A049456 Stern's diatomic array > I wonder why there is no xref concerning row sums. Row sum = 3^n+1 (and total for all rows 1/2*(3^(n+1)+1)+n) would be by Stern as summarized by Lehmer (ref in A049456). Dunno if Stern's original is easily available online.