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 A292147 #30 Jan 24 2020 15:11:26 %S A292147 0,0,0,0,1,1,2,0,1,2,4,1,3,5,5,2,3,2,6,5,2,8,11,1,3,7,6,7,6,7,13,7,4, %T A292147 8,8,5,5,13,14,8,8,4,8,14,5,17,22,5,5,7,8,14,8,14,18,13,4,11,18,7,10, %U A292147 22,18,15,7,9,10,19,9,16,29,8,9,12,10,23,9,19 %N A292147 Number of distinct convex pentagons that can be formed from n congruent isosceles right triangles. Reflections are not counted as distinct. %C A292147 Illustrated with other convex polyabolos in A245676. %H A292147 Douglas J. Durian, <a href="/A292147/b292147.txt">Table of n, a(n) for n = 1..750</a> %e A292147 The smallest convex pentagonal polyabolo is for n=5. %Y A292147 Strictly less than A245676. %K A292147 nonn %O A292147 1,7 %A A292147 _Douglas J. Durian_, Sep 10 2017 %E A292147 a(33) and beyond from _Douglas J. Durian_, Jan 24 2020