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 A002868 M1703 N0673 #51 Jul 02 2025 16:01:54
%S A002868 1,1,2,6,36,240,1800,15120,141120,1693440,21772800,299376000,
%T A002868 4390848000,68497228800,1133317785600,19833061248000,396661224960000,
%U A002868 8299373322240000,181400588328960000,4135933413900288000,98228418580131840000,2426819753156198400000
%N A002868 Largest number in n-th row of triangle of Lah numbers (A008297 and A271703).
%D A002868 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D A002868 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A002868 Vincenzo Librandi, <a href="/A002868/b002868.txt">Table of n, a(n) for n = 0..100</a>
%H A002868 Victor Meally, <a href="/A002868/a002868.pdf">Comparison of several sequences given in Motzkin's paper "Sorting numbers for cylinders...", letter to N. J. A. Sloane, N. D.</a>
%H A002868 T. S. Motzkin, <a href="/A000262/a000262.pdf">Sorting numbers for cylinders and other classification numbers</a>, in Combinatorics, Proc. Symp. Pure Math. 19, AMS, 1971, pp. 167-176. [Annotated, scanned copy]
%H A002868 OEIS Wiki, <a href="http://oeis.org/wiki/Sorting_numbers">Sorting numbers</a>
%F A002868 For 2 <= n <= 7, equals (n+1)!*n/2. - _Alexander R. Povolotsky_, Oct 16 2006
%p A002868 with(combinat): for n from 0 to 35 do big := 1: for m from 1 to n do if big < n!*binomial(n-1,m-1)/m! then big := n!*binomial(n-1,m-1)/m! fi: od: printf(`%d,`,big): od:
%t A002868 a[n_] := ( big = 1; For[ m = 1 , m <= n, m++, b = n!*Binomial[n - 1, m - 1]/m!; If[ big < b , big = b ]]; big); Table[a[n], {n, 0, 19}] (* _Jean-François Alcover_, Sep 21 2012, after Maple *)
%o A002868 (Haskell)
%o A002868 a002868 n = if n == 0 then 1 else maximum $ map abs $ a008297_row n
%o A002868 -- _Reinhard Zumkeller_, Sep 30 2014
%Y A002868 Essentially the same as A001286.
%Y A002868 Cf. A000262, A008297, A105278, A271703.
%K A002868 nonn,nice,easy
%O A002868 0,3
%A A002868 _N. J. A. Sloane_
%E A002868 More terms from _James Sellers_, Jan 03 2001