Holladay, John C. A smoothest curve approximation. (English) Zbl 0084.34904 Math. Tables Aids Comput. 11, 233-243 (1957). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 ReviewsCited in 54 Documents Keywords:numerical analysis PDFBibTeX XMLCite \textit{J. C. Holladay}, Math. Tables Aids Comput. 11, 233--243 (1957; Zbl 0084.34904) Full Text: DOI Online Encyclopedia of Integer Sequences: T(n,k) = A321119(n) - (-1)^k*A321119(n-2*k)/2 for 0 < k < n, with T(0,0) = 0 and T(n,0) = T(n,n) = A002530(n+1) for n > 0, triangle read by rows; unreduced numerator of the weights of Holladay-Sard’s quadrature formula. a(n) = ((1 - sqrt(3))^n + (1 + sqrt(3))^n)/2^floor((n - 1)/2); n-th row common denominator of A321118. Decimal expansion of (3 + sqrt(3))/12.