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%I #10 Apr 01 2015 08:00:57
%S 1,6,120,4200,211680,13970880,1141620480,111307996800,12614906304000,
%T 1629845894476800,236475822507724800,38072607423743692800,
%U 6735922851893114880000,1299070835722243584000000,271245990498804460339200000,60962536364606302461235200000
%N (2*(n-1))! * (2*n-1)! / (n * (n-1)!^3).
%C Central terms in triangles of Lah numbers: a(n) = - A008297(2*n-1,n) = A105278(2*n-1,n) = A000891(n-1)*A000142(n) = A000894(n-1)*A000142(n-1).
%C a(n) = n * A204515(n-1). - _Reinhard Zumkeller_, Oct 19 2014
%H Reinhard Zumkeller, <a href="/A248045/b248045.txt">Table of n, a(n) for n = 1..250</a>
%F n*a(n) = 4*(2*n-1)*(2*n-3)*a(n-1). - _R. J. Mathar_, Oct 07 2014
%o (Haskell)
%o a248045 n = a000891 (n - 1) * a000142 n
%Y Cf. A000142, A000891, A000894, A008297, A105278, A204515.
%Y Cf. A187535 (Central Lah numbers).
%K nonn
%O 1,2
%A _Reinhard Zumkeller_, Sep 30 2014
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