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 A050536 #16 Sep 29 2023 18:57:49 %S A050536 8,36,666,222111,24666759216,304224505122393846936, %T A050536 46276274758482720006792605816457695217516, %U A050536 1070746802761292462947634762387664148872006333922794021004562705432032738124213886 %N A050536 Iterated triangular numbers with seed 8. %H A050536 Reinhard Zumkeller, <a href="/A050536/b050536.txt">Table of n, a(n) for n = 0..10</a> %F A050536 a(n) = binomial(a(n-1)+1, 2), a(0)=8. %F A050536 a(n) ~ 2 * c^(2^n), where c = 4.2726038862497240421168669075178596377687659229240586312... . - _Vaclav Kotesovec_, Dec 17 2014 %t A050536 NestList[Binomial[#+1,2]&,8,7] (* _Harvey P. Dale_, Jan 22 2016 *) %o A050536 (Haskell) %o A050536 a050536 n = a050536_list !! n %o A050536 a050536_list = iterate a000217 8 -- _Reinhard Zumkeller_, Apr 10 2014 %o A050536 (PARI) a(n)=if(n==0,8,(a(n-1))*(a(n-1)+1)/2) \\ _Edward Jiang_, Sep 07 2014 %Y A050536 Cf. A000217. %Y A050536 Cf. A007501, A013589, A050542, A050548, A050909. %K A050536 easy,nice,nonn %O A050536 0,1 %A A050536 Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 29 1999 %E A050536 One more term (a(7)) from _Harvey P. Dale_, Jan 22 2016