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 A027300 #12 Oct 27 2019 11:35:44 %S A027300 0,1,1,1,2,2,2,3,4,4,2,4,5,6,6,4,6,8,9,10,10,4,8,10,12,13,14,14,7,11, %T A027300 15,17,19,20,21,21,8,15,19,23,25,27,28,29,29,12,20,27,31,35,37,39,40, %U A027300 41,41,14,26,34,41,45,49,51,53,54,55,55,21,35 %N A027300 Triangular array Q given by rows: Q(n,k) = number of partitions of n that do not contain k as an element; domain: 1 <= k <= n, n >= 1. %F A027300 Q(n, k) = P(n+1, 1) - P(n, k), P given by A027293. %F A027300 Q(n, k) = A000041(n) - A000041(n - k). - _Sean A. Irvine_, Oct 26 2019 %e A027300 Triangle begins: %e A027300 0, %e A027300 1, 1, %e A027300 1, 2, 2, %e A027300 2, 3, 4, 4, %e A027300 2, 4, 5, 6, 6, %e A027300 ... %Y A027300 Cf. A000041, A027293. %K A027300 nonn,tabl %O A027300 1,5 %A A027300 _Clark Kimberling_