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 A030619 #8 May 20 2021 14:44:13 %S A030619 0,1,0,0,0,1,2,2,1,0,0,0,0,-1,-1,0,1,1,1,1,1,1,1,2,2,2,2,3,3,4,4,4,4, %T A030619 4,3,4,3,3,3,4,5,5,5,5,5,5,5,4,4,5,5,5,5,5,5,5,4,4,5,6,6,6,7,8,8,7,7, %U A030619 7,7,6,6,6,6,6,6,6,6,6,6,6,6,6,5,4,4,5,5,5,6 %N A030619 a(n) = (# 2's)-(# 3's) in first n terms of A030604. %t A030619 Accumulate[Which[#==2,1,#==3,-1,True,0]&/@Flatten[IntegerDigits[#,6]&/@ Fibonacci[Range[2,30]]]] (* _Harvey P. Dale_, Feb 08 2015 *) %Y A030619 Cf. A030604. %K A030619 sign %O A030619 1,7 %A A030619 _Clark Kimberling_