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 A100169 #18 Aug 06 2025 09:28:19
%S A100169 1,92,438,1204,2555,4656,7672,11768,17109,23860,32186,42252,54223,
%T A100169 68264,84540,103216,124457,148428,175294,205220,238371,274912,315008,
%U A100169 358824,406525,458276,514242,574588,639479,709080,783556,863072
%N A100169 Structured pentagonal hexacontahedral numbers (vertex structure 16).
%H A100169 Vincenzo Librandi, <a href="/A100169/b100169.txt">Table of n, a(n) for n = 1..10000</a>
%H A100169 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,-6,4,-1).
%F A100169 a(n) = (1/6)*(165*n^3 - 225*n^2 + 66*n).
%F A100169 G.f.: x*(1 + 88*x + 76*x^2)/(1-x)^4. - _Colin Barker_, Feb 14 2012
%F A100169 a(n) = (55*n^3 - 75*n^2 + 22*n)/2. - _Wesley Ivan Hurt_, Nov 26 2013
%p A100169 A100169:=n->(55*n^3-75*n^2+22*n)/2; seq(A100169(n), n=1..100); # _Wesley Ivan Hurt_, Nov 26 2013
%t A100169 Table[(55n^3 - 75n^2 + 22n)/2, {n, 100}] (* _Wesley Ivan Hurt_, Nov 26 2013 *)
%o A100169 (Magma) [(1/6)*(165*n^3-225*n^2+66*n): n in [1..40]]; // _Vincenzo Librandi_, Jul 27 2011
%Y A100169 Cf. A100170 = alternate vertex; A100145 for more on structured numbers.
%K A100169 easy,nonn
%O A100169 1,2
%A A100169 James A. Record (james.record(AT)gmail.com), Nov 07 2004