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 A318598 #4 Aug 29 2018 17:43:20
%S A318598 1,1,18,406,9158,211880,5005980,119877472,2898762854,70625252863,
%T A318598 1731030733840,42634215112710,1054285960975268,26159486052576800,
%U A318598 650961394904288192,16239221627803363280,405994987399334500710,10169699086799914175514,255172150241034559336782
%N A318598 Number of n-member subsets of [10*n] whose elements sum to a multiple of ten.
%H A318598 Alois P. Heinz, <a href="/A318598/b318598.txt">Table of n, a(n) for n = 0..710</a>
%e A318598 a(2) = 18: {1,9}, {1,19}, {2,8}, {2,18}, {3,7}, {3,17}, {4,6}, {4,16}, {5,15}, {6,14}, {7,13}, {8,12}, {9,11}, {10,20}, {11,19}, {12,18}, {13,17}, {14,16}.
%Y A318598 Column k=10 of A318557.
%K A318598 nonn
%O A318598 0,3
%A A318598 _Alois P. Heinz_, Aug 29 2018