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 A084536 #9 Jan 27 2020 01:23:55 %S A084536 1,1,3,1,6,10,1,9,29,36,1,12,57,132,137,1,15,94,315,590,543,1,18,140, %T A084536 612,1629,2628,2219,1,21,195,1050,3605,8127,11732,9285,1,24,259,1656, %U A084536 6950,19992,39718,52608,39587,1,27,332,2457,12177,42498,106644,191754 %N A084536 Triangular array related to Motzkin triangle A026300. %C A084536 Reversal of A091965. Row sums give A026378. - _Philippe Deléham_, Mar 23 2007 %D A084536 A. Nkwanta, Lattice paths and RNA secondary structures, in African Americans in Mathematics, ed. N. Dean, Amer. Math. Soc., 1997, pp. 137-147. %F A084536 T(n,n) = A002212(n+1). - _Philippe Deléham_, Mar 23 2007 %e A084536 Triangle begins %e A084536 1; %e A084536 1, 3; %e A084536 1, 6, 10; %e A084536 1, 9, 29, 36; %e A084536 1, 12, 57, 132, 137; ... %K A084536 nonn,tabl %O A084536 0,3 %A A084536 _N. J. A. Sloane_, Jun 29 2003 %E A084536 More terms from _Philippe Deléham_, Mar 23 2007