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 A179087 #15 May 04 2019 23:07:00 %S A179087 1,1,1,-3,14,-3,-11,35,35,-11,-7,-84,566,-84,-7,41,-843,2722,2722, %T A179087 -843,41,117,-2854,763,50028,763,-2854,117,29,-4681,-80211,407423, %U A179087 407423,-80211,-4681,29,-527,4504,-720740,1560616,8634214,1560616,-720740,4504,-527,-1199,68393,-4275340,-6925948,104031374,104031374,-6925948,-4275340,68393,-1199,237,338918,-19903639,-195090616,799237802,2546725796,799237802,-195090616 %N A179087 Triangle T(n,k) read by rows: the real part of the coefficient [x^k] of (1-x)^(n+1) * Sum_{s>=0} ((2*s + 1 + 2*i)^n)*x^s, where i is the imaginary unit. %e A179087 Triangle begins %e A179087 1; %e A179087 1, 1; %e A179087 -3, 14, -3; %e A179087 -11, 35, 35, -11; %e A179087 -7, -84, 566, -84, -7; %e A179087 41, -843, 2722, 2722, -843, 41; %e A179087 117, -2854, 763, 50028, 763, -2854, 117; %e A179087 29, -4681, -80211, 407423, 407423, -80211, -4681, 29; %p A179087 A179087 := proc(n,k) %p A179087 (1-x)^(n+1)*add( (2*s+1+2*I)^n*x^s,s=0..k) ; %p A179087 expand(%) ; %p A179087 coeftayl(%,x=0,k) ; %p A179087 Re(%) ; %p A179087 end proc: # _R. J. Mathar_, Oct 06 2011 %Y A179087 Cf. A000165 (row sums), A006495 (column k=0). %K A179087 sign,tabl %O A179087 0,4 %A A179087 _Roger L. Bagula_, Jun 28 2010 %E A179087 Sequence replaced with one that is more likely to occur in practice by _R. J. Mathar_, Oct 06 2011