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 A055107 #7 Mar 12 2022 22:44:55 %S A055107 1,1,1,1,4,1,1,8,12,1,1,13,44,33,1,1,19,109,208,88,1,1,26,223,753,910, %T A055107 232,1,1,34,405,2091,4674,3809,609,1,1,43,677,4926,17220,27161,15521, %U A055107 1596,1,1,53,1064,10342,51702,130480,151134,62185,4180,1 %N A055107 Triangle T(k,n) giving number of symmetric polynomials of degree n in k noncommuting variables, n >=2, 2 <= k <= n. %C A055107 A055106 with rows reversed. - _Sean A. Irvine_, Mar 12 2022 %D A055107 M. C. Wolf, Symmetric Functions of Non-commutative Elements, Duke Math. J., 2 (1936), 626-637. %e A055107 1; 1,1; 1,4,1; 1,8,12,1; 1,13,44,33,1; ... %Y A055107 Row sums are A074664. Cf. A055105, A055106. %K A055107 nonn,tabl,nice %O A055107 2,5 %A A055107 _N. J. A. Sloane_, Jun 14 2000 %E A055107 More terms and offset corrected by _Sean A. Irvine_, Mar 12 2022