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 A039961 #15 Jul 08 2025 22:40:53
%S A039961 1,1,1,-1,1,-1,-1,1,-1,-2,1,1,-1,-3,2,1,1,-1,-4,3,3,-1,1,-1,-5,4,6,-3,
%T A039961 -1,1,-1,-6,5,10,-6,-4,1,1,-1,-7,6,15,-10,-10,4,1,1,-1,-8,7,21,-15,
%U A039961 -20,10,5,-1,1,-1,-9,8,28,-21,-35,20,15,-5,-1,1,-1,-10
%N A039961 Triangle of coefficients in a Fibonacci-like sequence of polynomials.
%C A039961 Essentially the same as A108299. - _Philippe Deléham_, Feb 27 2014
%D A039961 A. F. Horadam, R. P. Loh and A. G. Shannon, Divisibility properties of some Fibonacci-type sequences, pp. 55-64 of Combinatorial Mathematics VI (Armidale 1978), Lect. Notes Math. 748, 1979.
%F A039961 q_{n+2}(x) = x*q_{n+1}(x)-q_n(x), q_1(x) = q_2(x) = 1.
%e A039961 Triangle starts:
%e A039961 1
%e A039961 1
%e A039961 1 -1
%e A039961 1 -1 -1
%e A039961 1 -1 -2 1
%e A039961 1 -1 -3 2 1
%e A039961 ...
%Y A039961 Cf. A065941, A108299.
%K A039961 sign,tabf
%O A039961 1,10
%A A039961 _N. J. A. Sloane_
%E A039961 More terms from _Philippe Deléham_, Feb 27 2014