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 A062896 #19 Nov 21 2021 09:54:11 %S A062896 1,2,2,4,4,7,7,12,12,18,19,27,28,39,41,54,58,74,78,99,106,129,139,168, %T A062896 179,214,229,268,289,335,357,414,443,504,540,612,653,737,786,878,938, %U A062896 1045,1111,1234,1313,1444,1539,1692,1795,1965,2082,2273,2414 %N A062896 Number of addition triangles with apex n (version 2). %C A062896 An addition triangle has any set of positive numbers as base; other rows are formed by adding pairs of adjacent numbers. %C A062896 Reversing the base does not count as a different triangle. %H A062896 Seiichi Manyama, <a href="/A062896/b062896.txt">Table of n, a(n) for n = 1..200</a> %e A062896 For n = 5: %e A062896 5 %e A062896 2,3 5 5 %e A062896 1,1,2 4,1 2,3 5. %e A062896 with four different bases, so a(5) = 4. %Y A062896 See A062684 for version 1 (counts reversals). %Y A062896 Equivalent sequences with restrictions on rows: A337765 (weakly increasing), A337766 (strongly increasing). %Y A062896 Equivalent sequence where n is the sum of all numbers in the triangle: A337787. %Y A062896 Cf. A028307, A066411. %K A062896 easy,nonn %O A062896 1,2 %A A062896 _Naohiro Nomoto_, Feb 11 2002 %E A062896 Extended and edited by _John W. Layman_, Feb 14 2002