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 A189675 #19 Feb 12 2014 02:43:14
%S A189675 1,-1,2,2,-4,3,-5,10,-9,5,14,-28,27,-20,8,-42,84,-84,70,-40,13,132,
%T A189675 -264,270,-240,160,-78,21,-429,858,-891,825,-600,351,-147,34,1430,
%U A189675 -2860,3003,-2860,2200,-1430,735,-272,55,-4862,9724,-10296,10010,-8008,5577,-3234,1496,-495,89,16796,-33592,35802,-35360,29120,-21294,13377,-7072,2970,-890,144,-58786,117572,-125970,125970,-106080,80444,-53508,30940,-15015,5785,-1584,233
%N A189675 Composition of Catalan and Fibonacci numbers.
%C A189675 Row sums equal 1 (proof by _Bill Gosper_, Apr 17 2011). Row sums of absolute terms equal A081696.
%D A189675 Email of R. W. Gosper on the math-fun mailing list, Apr 17 2011.
%e A189675 Table starts
%e A189675 1,
%e A189675 -1, 2,
%e A189675 2, -4, 3,
%e A189675 -5, 10, -9, 5,
%t A189675 Table[(-1)^(k + n) k/(2n - k) Binomial[2n - k, n - k] Fibonacci[k + 1], {n, 12}, {k, n}]
%Y A189675 Cf. A081696, A171567, A064310.
%K A189675 sign,tabl
%O A189675 1,3
%A A189675 _Wouter Meeussen_, Apr 25 2011