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 A325732 #12 May 22 2019 22:56:42
%S A325732 0,1,-1,1,-1,1,-1,0,7,-35,119,-329,791,-1715,3430,-6419,11319,-18767,
%T A325732 28763,-38759,38759,1,-149228,572057,-1615429,3979001,-9014851,
%U A325732 19251001,-39309301,77558760,-149239771,282712561,-532577025,1008032953,-1934671809,3787949521
%N A325732 First term of n-th difference sequence of (floor(k*r)), r = sqrt(3/4), k >= 0.
%H A325732 Clark Kimberling, <a href="/A325732/b325732.txt">Table of n, a(n) for n = 1..200</a>
%t A325732 Table[First[Differences[Table[Floor[Sqrt[3/4]*n], {n, 0, 50}], n]], {n, 1, 50}]
%Y A325732 Cf. A325664. Inverse binomial Transform of A171970 and A172475.
%Y A325732 Cf. A010527 (sqrt(3/4)).
%K A325732 easy,sign
%O A325732 1,9
%A A325732 _Clark Kimberling_, May 20 2019