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 A156064 #7 Dec 25 2018 22:23:17 %S A156064 1,0,1,0,0,1,0,0,0,1,-1,0,0,0,1,0,-2,0,0,0,1,0,0,-3,0,0,0,1,0,0,0,-4, %T A156064 0,0,0,1,4,0,0,0,-5,0,0,0,1,0,9,0,0,0,-6,0,0,0,1,0,0,15,0,0,0,-7,0,0, %U A156064 0,1,0,0,0,22,0,0,0,-8,0,0,0,1,-22,0,0,0,30,0,0,0,-9,0,0,0,1,0,-52,0,0,0,39 %N A156064 Inverse of Riordan array (1/(1-x^4), x/(1-x^4)), A156062. %C A156064 Reverse and aerate A069270. First column is signed aerated version of A002293. Diagonal sums are A156065. %H A156064 Chai Wah Wu, <a href="https://arxiv.org/abs/1810.02293">Record values in appending and prepending bitstrings to runs of binary digits</a>, arXiv:1810.02293 [math.NT], 2018. %e A156064 Triangle begins %e A156064 1; %e A156064 0, 1; %e A156064 0, 0, 1; %e A156064 0, 0, 0, 1; %e A156064 -1, 0, 0, 0, 1; %e A156064 0, -2, 0, 0, 0, 1; %e A156064 0, 0, -3, 0, 0, 0, 1; %e A156064 0, 0, 0, -4, 0, 0, 0, 1; %e A156064 4, 0, 0, 0, -5, 0, 0, 0, 1; %e A156064 0, 9, 0, 0, 0, -6, 0, 0, 0, 1; %e A156064 0, 0, 15, 0, 0, 0, -7, 0, 0, 0, 1; %e A156064 0, 0, 0, 22, 0, 0, 0, -8, 0, 0, 0, 1; %e A156064 -22, 0, 0, 0, 30, 0, 0, 0, -9, 0, 0, 0, 1; %e A156064 Production matrix is %e A156064 0, 1; %e A156064 0, 0, 1; %e A156064 0, 0, 0, 1; %e A156064 -1, 0, 0, 0, 1; %e A156064 0, -1, 0, 0, 0, 1; %e A156064 0, 0, -1, 0, 0, 0, 1; %e A156064 0, 0, 0, -1, 0, 0, 0, 1; %e A156064 0, 0, 0, 0, -1, 0, 0, 0, 1; %e A156064 0, 0, 0, 0, 0, -1, 0, 0, 0, 1; %e A156064 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 1; %e A156064 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 1; %e A156064 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 1; %e A156064 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 1; %e A156064 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 1; %K A156064 easy,sign,tabl %O A156064 0,17 %A A156064 _Paul Barry_, Oct 20 2009